[R] Fw: problem with nlsLM.....

J C Nash
2019-03-20T12:45:14Z

Of course, you might just try a more powerful approach. Duncan responded to the
obvious issue earlier,
but the second problem seems to need the analytic derivatives of the nlsr
package. Note that
nlsLM uses the SAME very simple forward difference derivative approximation for
the Jacobian.
Optimization folk will generally say "singular Jacobian" and the
singular values reported by
nlsr show how bad the case is here. Note that the nlsr output summary seems to
imply that
the singular values are associated with specific parameters. My bad -- I wanted
to keep
the summary tidy. The sv's apply to the problem in general, but there are as
many of them as
parameters, so they fit on the page nicely where I've put them. The
singularity leads to no
standard errors, of course.

JN

>> library(nlsr)
>> nonlin_modDH5 <- nlxb(formulaDH5, start = list(a = 0.43143, b =
0.68173,A = 0.09,w = 0.8,c = 0.01,C = 0.94))
> vn:[1] "HM1" "a"   "b"   "HM2"
"A"   "w"   "HM3" "c"   "C"
> no weights
>> nonlin_modDH5
> nlsr object: x
> residual sumsquares =  0.66987  on  680 observations
>     after  15    Jacobian and  20 function evaluations
>   name            coeff          SE       tstat      pval      gradient
JSingval
> a              0.0929101            NA         NA         NA  -5.817e-07
42.97
> b               0.541246            NA         NA         NA  -3.359e-07
7.043
> A             0.00921275            NA         NA         NA    9.42e-08
0.984
> w               0.545654            NA         NA         NA  -8.693e-09
0.195
> c              -0.770181            NA         NA         NA    -5.2e-09
0.07464
> C                0.60148            NA         NA         NA  -5.817e-07
7.567e-14
>>



On 2019-03-20 4:20 a.m., akshay kulkarni wrote:
> dear members,
>                              I think Duncan's  solution is not
working...I've checked the function again:
>
>> formulaDH5 <- as.formula(HM1 ~ (a + (b * ((HM2 + 0.3)^(1/2)))) +
(A*sin(w*HM3 + c) + C))
>> nonlin_modDH5 <- nls(formulaDH5, start = list(a = 0.43143, b =
0.68173,A = 0.09,w = 0.8,c = 0.01,C = 0.94))
> Error in nlsModel(formula, mf, start, wts) :
>   singular gradient matrix at initial parameter estimates
>> nonlin_modDH5 <- nlsLM(formulaDH5, start = list(a = 0.43143, b =
0.68173,A = 0.09,w = 0.8,c = 0.01,C = 0.94))
> Error in nlsModel(formula, mf, start, wts) :
>   singular gradient matrix at initial parameter estimates
>
>
> I've checked the Internet  for a method of getting the starting values,
but they are not comprehensive....any resources for how to find the starting
values?
>
>> dput(HM1)
> c(1.01484280343579, 0.977004104656811, 1.02448653468064, 1.01562102015533,
> 0.968359321714289, 0.99105072887847, 0.99384582083167, 1.00579414727333,
> 0.967593120445675, 1.04694148058855, 1.03832347454026, 0.971040156128456,
> 0.976967848281943, 0.990386686964446, 1.02257020722784, 0.994529161072552,
> 1.05361176882747, 0.988021514764882, 0.998909692369571, 1.04933819895509,
> 0.988354009297047, 0.878584020586706, 1.01438895222572, 1.01522203155842,
> 0.999979601913003, 0.975862934766315, 1.03948445565434, 1.02493339899053,
> 0.972267168470219, 0.971001051421653, 1.03066167719129, 0.967898970631469,
> 0.976606662010519, 0.990061873979734, 1.03398666689317, 1.05491455733517,
> 0.995997711923663, 0.991213393857838, 0.9903216916016, 1.06850794640807,
> 1.01345738121581, 0.877847194198055, 0.992124544661245, 1.00927272338804,
> 0.988196514422814, 0.987504905313256, 0.990274516132497, 1.01484624802751,
> 0.9800176904083, 0.969321725342799, 1.07407427451262, 1.02023130729371,
> 0.975827723120998, 0.988260886231393, 1.05116598585815, 0.977996171738906,
> 0.985118207891832, 0.98243346941999, 0.991380612684958, 1.00960741365585,
> 1.03062446605116, 1.04176358759364, 1.02494798972349, 1.04645592406625,
> 0.999998705820515, 0.972161829098397, 0.991313521356105, 1.0211561076261,
> 0.971257832217016, 1.00935026461508, 0.997140402835885, 1.00719609467891,
> 0.97483865743955, 0.987491380127905, 1.0643888147255, 1.00804564512905,
> 0.989366232219398, 0.942042386899482, 1.0140328534339, 0.98812919092058,
> 1.04584882138055, 0.970586857498767, 1.0098232311784, 1.02237732533005,
> 0.99306513943649, 0.963808401790738, 1.03577231048959, 1.00540101137939,
> 0.970458918298484, 0.973460294926879, 0.992676651187501, 1.04079931972326,
> 0.988928168736541, 0.986376934855979, 1.04117941173535, 1.01252015337269,
> 0.920578394310677, 0.98933093765412, 0.98116698970429, 0.995498900493761,
> 0.96463760451942, 1.1059686605887, 1.03366353582116, 0.981256131441973,
> 1.0152599452654, 0.995362080418312, 0.997276311537458, 0.943438355295013,
> 1.04025117202718, 1.03102737097366, 1.02096902615856, 1.02506560388494,
> 0.959364103040633, 0.987217067188943, 1.00454456275356, 1.03517749036747,
> 1.0148342900634, 0.974518005568706, 1.02515903830848, 1.00435361604303,
> 0.973400954462685, 0.981702992961201, 1.0155969247203, 1.01064154947471,
> 0.957131570492054, 0.88504625471737, 1.01849907662046, 1.01503806358198,
> 0.987004149653273, 0.974485857983481, 0.987572979379099, 1.0037529762248,
> 0.976026658183349, 0.983176178747953, 1.03812943411666, 1.01828203593425,
> 0.984139742592733, 1.00377243020886, 1.02118652563454, 1.01115776483144,
> 0.98387406692053, 0.985919715423209, 0.989550590454508, 1.01845373071313,
> 1.00394660346757, 0.949076679285431, 1.06094051230739, 0.981940494629297,
> 0.982812578115724, 0.929673163266673, 1.05359335975355, 1.03498999963467,
> 0.989218608625026, 0.994412680504384, 1.03162650392014, 1.04359975620911,
> 0.96938669600183, 0.987150178669349, 0.990503131271205, 1.01120231626779,
> 0.977334529946535, 0.966013274319284, 1.04966722359666, 1.04745672849702,
> 0.960799643211444, 0.866626315091455, 1.01316731305781, 1.02919067036911,
> 0.988567285725018, 0.978702298855537, 1.0186604054056, 1.01398864226215,
> 0.985492431198792, 1.03982326960775, 1.02287049736119, 1.02357106122821,
> 0.977519287403578, 0.993818572820706, 1.01139405704906, 1.02683235508704,
> 0.943370973180458, 0.970153991236375, 0.970746163945049, 1.00996886938921,
> 0.970599365922215, 1.03230385881209, 1.02072718512322, 1.0161024503161,
> 0.987718207880278, 0.987512809150475, 1.04108232940019, 1.0153758143276,
> 1.03916475100072, 0.959776942350879, 1.01739288375256, 1.05438479662213,
> 0.970479916939806, 0.979826128477137, 0.982800613999074, 0.977050857426291,
> 0.977474025608337, 0.972905352371901, 1.02191626900472, 1.02737043327345,
> 0.987565251408109, 0.93131925605196, 0.991469304659888, 0.949708678221412,
> 0.948662234856045, 0.938158485016718, 1.02342896552764, 1.01869899424866,
> 1.01244484998263, 0.990637832491416, 1.04591108144934, 0.951244278685872,
> 0.977265525807748, 0.942206977147219, 1.09440128638859, 1.02935716108991,
> 0.978428723706514, 1.08589930790608, 1.0015813231405, 1.07512822987239,
> 0.976356469419301, 0.972775004620642, 1.00954673593815, 0.992551447194369,
> 0.985819189451289, 0.975310750212573, 1.05999783258221, 1.07815688799274,
> 0.959648862885262, 1.03418767541976, 1.07207529899183, 1.04949264142055,
> 0.966872387358102, 0.963564695272614, 1.01310836328613, 0.996622968927382,
> 1.00202486063801, 0.948215304098709, 1.02845448262427, 0.987124642586768,
> 0.999269328077687, 0.964674178364545, 0.991913103743918, 0.970556592778505,
> 0.979495816235886, 0.949160643807912, 0.999611005677085, 1.01697727168167,
> 0.966362681248743, 0.938703012004999, 1.01394761650376, 1.011369485146,
> 0.975929406359934, 0.97111480362557, 1.0581474202687, 1.03965938660391,
> 0.990447147628825, 0.967286377976687, 0.968162001740811, 1.00573452177125,
> 0.974628505381728, 0.983183640545729, 1.08185959707149, 0.976533333333333,
> 0.932582771965921, 1.02205682784386, 1.02162002635618, 1.00634335266967,
> 1.03045302554561, 1.05015537832235, 1.0238800474742, 1.0151188247761,
> 0.951176244898346, 0.937999477475998, 0.986664690881963, 1.00889938014614,
> 0.972546365957459, 0.937560562249233, 0.953227957137494, 0.964284336810156,
> 0.977909815090698, 0.988068102557503, 1.04429493287078, 1.01803069781624,
> 0.957632272450841, 0.971991500790857, 0.98209395086599, 1.02815448263624,
> 0.947227198465786, 0.941538843776026, 1.05745885548346, 1.01671992454154,
> 0.983992269183969, 0.951511089781983, 1.0110983382201, 1.00912039359684,
> 1.14741321154181, 0.985344569298617, 0.986725720078838, 1.03117619992574,
> 1.21391930217405, 0.997217690041687, 1.07387278335981, 1.02108776576674,
> 1.10313006343474, 1.10905015571117, 1.03999508931616, 1.03976033898847,
> 1.02524837903366, 0.984818521675578, 1.04179889608739, 0.975154632188378,
> 0.969607959579886, 1.02781726918172, 0.999963290601752, 1.01515310515696,
> 1.00520167771997, 0.984550628692601, 1.01902810624565, 1.00685219196689,
> 0.982173452231062, 0.999629285915004, 0.970558368481076, 0.995716235126211,
> 1.01314341676203, 1.02075675497478, 1.01128668171558, 1.05844449406008,
> 1.02510935720045, 0.983720171349822, 0.844396082698583, 1.05810846093782,
> 0.99048977314373, 0.971262209252963, 0.968530578900656, 1.04638759101296,
> 1.1799017507928, 0.898448146333193, 1.01160891745375, 1.01132611427775,
> 0.973840647644128, 1.04683923857471, 0.990344793003927, 1.0068683076688,
> 0.992798241837764, 0.99368375299494, 1.01200003722717, 1.0294016781563,
> 1.01547984207734, 1.04807175686468, 0.981737356425208, 1.06169292627851,
> 1.00518291863648, 0.976808854545251, 0.999321592083517, 0.97527078961014,
> 0.904376968942001, 0.987807226191329, 1.0350293488462, 1.02802944623052,
> 0.963692701708712, 0.998027399233401, 1.01762747994825, 1.0361812777154,
> 0.988298193013531, 1.04174794125517, 0.970839140069407, 1.0011387710754,
> 0.961691863428911, 1.02272120871699, 1.00519180537531, 0.999331326197155,
> 0.988055521308447, 1.00078630058504, 1.03915754537212, 0.971719181925134,
> 0.947846525645955, 0.955178087494908, 1.0019107391621, 1.01160524115586,
> 0.984958748948305, 0.967579294820259, 1.00552471207069, 1.04518978636097,
> 1.01810784117456, 0.993552343701494, 1.03535983577691, 0.982973964981781,
> 0.976175417305875, 0.971173421374951, 1.02622192154044, 1.06169292627851,
> 0.980316131595686, 0.98802873807095, 1.02522486330609, 1.01920704714191,
> 0.987730950969463, 0.972320506142784, 1.02950031603837, 1.01481027236895,
> 1.05066348592531, 0.941412086703545, 1.00426249434292, 0.997599618540051,
> 0.9727707483253, 0.987822018689403, 1.00496006171741, 1.00365488022554,
> 0.982021737672154, 0.946014836456916, 0.977232083157459, 1.04246004468132,
> 0.981228463109654, 0.971195860055527, 0.957569129533581, 0.987312165664453,
> 0.955583610052133, 0.991173211015633, 0.988434021882053, 0.94971029297998,
> 1.02260060019826, 0.986729432665294, 1.00044978044626, 1.00283798105021,
> 0.97876379280085, 0.948623031823408, 1.02317511219612, 1.02274213461243,
> 0.952138762776323, 0.974014522860041, 1.02874293788325, 1.02108205408977,
> 0.950582622331241, 0.986098109021331, 1.00098916530354, 1.05435029523389,
> 0.999921440746985, 0.964778188342829, 1.02087753056688, 1.0295810738595,
> 0.981181990342875, 0.94981916198993, 1.00828646284387, 1.01127872412662,
> 0.976192285243012, 0.95032633282931, 1.02884118341175, 1.01603776783957,
> 0.952947066257398, 0.988924105443658, 1.02727453593468, 1.02944328284254,
> 0.970561666318556, 0.982859453938812, 0.995886713501412, 1.04330648532137,
> 0.991844865771659, 0.99159250467833, 1.0332159700053, 0.993864541664301,
> 0.952716253755034, 0.960889912140351, 0.945669021854222, 0.985578531230794,
> 0.975053113912155, 0.999552576905685, 1.02526821151208, 1.00450298718514,
> 0.948193972002236, 0.99358065264941, 1.04855364680554, 0.982181523974446,
> 0.957570494265717, 0.989249667650167, 1.01928030167592, 0.977392376116208,
> 0.98989833978368, 0.950312758756191, 1.01179069272545, 1.03630963397181,
> 0.997439452068598, 0.981793158114732, 0.98560918506727, 1.0497573745934,
> 1.06729226949522, 0.987962794653476, 1.05655507163022, 1.01896087310511,
> 0.985627836611195, 1.03148215915346, 1.07268555224398, 1.00116324087534,
> 1.0353274520202, 0.965843323254256, 0.981731445105197, 1.01927876056569,
> 0.999117162412819, 0.984262994383997, 1.0058994935294, 1.03100765642408,
> 0.970000664632288, 0.974667000854514, 1.02683721041632, 1.00224180239507,
> 0.976488446884133, 0.989129579180466, 1.01111944121172, 1.01081759149299,
> 0.990822520380867, 0.951849309560414, 1.0533258785109, 1.02605855087945,
> 0.993203883495146, 1.01231349444546, 1.05040134097269, 0.988195090931879,
> 0.998324259112233, 0.955268105597824, 1.01179535756103, 1.00923640076821,
> 1.01018973127051, 0.97727388908476, 1.0163531272719, 1.03445181115965,
> 0.922709820364792, 1.05034425545701, 0.971929096725562, 1.01600521659268,
> 0.989307124797035, 0.966327502991904, 1.0148486097639, 1.00804453317389,
> 0.986688556832374, 1.01100519377607, 1.07022911567444, 1.01751745478207,
> 1.00395256916996, 1.02666291685486, 1.04306886282915, 0.976284796774505,
> 0.873912939480404, 0.985956634379203, 0.966005821428092, 1.01911378235808,
> 0.989971040708023, 0.948518684869746, 0.964578663605958, 1.00130118816861,
> 1.14681217078448, 0.989198271209915, 0.975831372743337, 0.87134009583841,
> 0.999320371256267, 1.04366317607907, 1.0941742251269, 1.04912747347822,
> 0.873169695550468, 0.9946703855144, 1.02687904508206, 1.01557590029223,
> 0.979039928979583, 0.978199700239161, 0.988038704848986, 0.944583404359117,
> 0.97831517569251, 0.9881631354812, 0.990553852862955, 1.05139702349736,
> 0.987315661692795, 0.973936995140175, 1.06038641236987, 1.0651525599012,
> 0.997891074790299, 0.979657304627723, 0.976638433723023, 0.981157058049022,
> 0.974773098042751, 1.04814547433216, 1.02327857487465, 1.01725074945885,
> 0.978364366421386, 1.02726007295919, 1.02997589351422, 1.0208112362723,
> 0.965389721633011, 1.01152741033802, 1.00352090319123, 0.981151102088714,
> 0.986010324656192, 0.97990659165448, 0.990503768576242, 0.985301104774446,
> 0.976384165205197, 0.983887706958686, 0.992885571845564, 0.985757622165226,
> 0.946874017209482, 0.990962963812142, 1.04319324396693, 1.07354098057006,
> 0.984597785175012, 0.97845443949194, 0.963960215777945, 1.06584156194012,
> 1.15623372835712, 0.94928101059165, 1.05512096334013, 1.00899261027951,
> 1.00760894032175, 0.989021593753401, 1.01442722705518, 1.04495346859144,
> 1.00095646335122, 0.958907195434402, 1.02045280866442, 1.00659622664478,
> 0.980590749755976, 1.01197688939839, 0.998468538022796, 1.040625279257,
> 0.934164344256759, 0.992160161968429, 0.998594942355232, 1.0532781805963,
> 0.974144103277039, 0.946253316413415, 1.00623102828924, 0.988787044999963,
> 0.987541467770869, 0.999140303075891, 1.05429436081972, 1.01617267860198,
> 1.17044068684611, 1.05663112916056, 1.01681282884482, 1.02872692218644,
> 1.00738468152863, 1.0222081131894, 1.01817103171172, 1.01222250929532,
> 0.97386289237006, 0.987701353725335, 1.00418624697519, 1.0183108729199,
> 0.956852868616883, 1.05440980534023, 1.01562402108019, 1.00083274000183,
> 0.945641654423597, 0.966367379950251, 1.02020174816679, 1.01151664724635,
> 0.940072052642951, 0.991027873457432, 0.984568985852697, 1.02373049431651,
> 0.985887377562884, 1.05498951399906, 0.98672427011774, 1.02570399134917,
> 1.06987898201568, 1.02648218241568, 0.971175525661877, 1.03211886190237,
> 0.992647697074835, 0.986388969656675, 1.02097305537141, 1.04518978636097,
> 0.987300416455667, 0.985182286987375, 1.02373433952904, 1.01376295257605,
> 0.992398195656577, 0.983765510339449, 1.06154013507033, 1.01312319643703
> )
>
>
>> dput(HM3)
> c(0.196622289085315, -0.0436031046458981, 0.000820037203846464,
> 0.392758326108918, 0.0445839547736504, 0.223969403187679,
-0.070152338130932,
> 0.197471312884591, 0.0498910549108242, -0.620322188497616,
0.488037411730214,
> 0.0461937792271113, 0.0051066586622384, 0.413877974790452,
-0.154637441642314,
> 0.229802002983503, 0.509904610124243, 0.126452664534026, 0.583037470359474,
> 0.470621010682895, -0.00578078533090776, -0.457074922218691,
> -0.0506356375273661, -0.767302691971105, -0.000822439375515026,
> -0.170080770417037, -0.0638533091192526, 0.218492017287635,
-0.088210288825341,
> -0.389219867379597, 1.23355646106213, -1.78773586807154,
0.0117401974737664,
> -0.154882548871051, -2.11547741687211, -0.0638533091192526,
-8.18190789706224,
> 0.282699360997887, 0.0383693451361519, -0.0638533091192526,
0.832793868600698,
> 0.894379977535782, -0.302329357989944, 0.573489523345283,
-0.223540700260161,
> 0.229802002983503, 0.0239731624923989, 0.556201388601996,
-0.112552578411774,
> -0.0438764575701239, 0.470621010682895, -4.92500180132548,
0.00309129784132211,
> 0.172407876390051, 0.229802002983503, 0.061799194890529,
-0.000864150216291216,
> -0.0683834224257835, -1.42874041532869, 0.654009227783557,
-0.620322188497616,
> 0.272034153890376, -0.00558557185457871, 0.229802002983503,
-1.53118563423569e-05,
> 0.470621010682895, -0.736608540541868, -1.47747441666374,
-0.00291475050109709,
> -1.56966101463791, 0.362334298169537, -1.41867286052432,
-0.0062864890624406,
> -0.223090980170635, 0.229802002983503, 0, 0.0147973092972513,
> 0.757637727251206, 0.332227874554666, -0.620322188497616,
-0.0638533091192526,
> -0.0638533091192526, 1.59477829009842, -0.247635059505396,
-0.0638533091192526,
> 0.384123364351151, -0.909542286753924, -1.61643290186366,
-0.00969493151693274,
> -0.0638533091192526, 0.335128597413319, 0.229802002983503,
-3.36005853184083,
> -1.77772450660144, -0.223359097040026, -4.75082975711953,
0.545441153017038,
> -0.0181047188208818, 0.229802002983503, 0.718505786757723,
-0.199075726922584,
> 0.0779145211225284, 0.0981591683724576, -0.0638533091192526,
> 0.771585236053205, -0.124873344480422, -0.143455357050914,
-0.982192613814533,
> 0.840325570227771, -0.0639597669819456, 0.272309718636627,
0.470621010682895,
> 0.000149945344883234, 0.0179651303218593, 0.586470204231886,
> 1.12661379530659, 0.587538739887084, -0.389219867379597, 0.231816913894395,
> -2.32942853843292, 0.229802002983503, 0.470621010682895, 7.7137219916985,
> 3.14411367083572, 0.0371415305209129, 0.109258089720235,
0.0744990417275174,
> 0.978949955731298, 0.0046627432182197, 0.0778534035355464,
-0.258075504911111,
> 0.428481177165365, 0.470621010682895, 0.0118295358531435,
0.601929630798962,
> 0.677233238299559, -0.620322188497616, 0.901650947775265,
0.229802002983503,
> 0.114385813284502, -0.287236365991277, 0.00362108510216535,
0.54836513813854,
> -0.360900820378516, 0.901102331983843, 0.303232126663717,
-0.389219867379597,
> -0.389219867379597, -0.0638533091192526, 0.0172621246134547,
> -0.0638533091192526, 0.036790744537595, 0.0267711437261105,
0.229802002983503,
> 2.31402345437609, 0.229802002983503, -0.620322188497616, 0.470621010682895,
> -0.0638533091192526, 0, -0.0638533091192526, 0.683308812634821,
> 0.598730940691975, 0.229802002983503, 0.697360153425382,
0.00772365161682687,
> -4.74600966429007, 0.593589435095411, -0.152099577506429,
0.0064938252361837,
> -0.108940122157535, 0.0514396263381645, 1.10452888209261,
0.229802002983503,
> -0.0638533091192526, 0, 0.0362637715949993, -2.79167649513235,
> 0.0221979095188955, 0.122798837911884, -3.07802860403649,
0.887963749928486,
> -0.0638533091192526, -2.59080601794078, -0.0638533091192526,
> -0.0720032601992142, 0.188653367126112, -0.390900634446388,
0.00626262322890335,
> 0.10449726079375, 0.190234594305548, 0.229802002983503, 0.470621010682895,
> 0.441447072301397, 0.710575973379983, 0.424723018059659,
0.0242933124111495,
> -0.0638533091192526, 0.221839916416526, 0.470621010682895,
-0.0108657434161119,
> 0.734169111179744, 0.465629851897761, 0.0252290916908343,
-0.0261736586703599,
> 0.470621010682895, 0.00872967160561454, 0.820007851307147,
-0.0638533091192526,
> 0.162601634884078, 0.15876421059534, 0.276805180633414, -0.386980840708979,
> 0.10228170638373, 0.0199458385530109, 0.470621010682895, 0.360613568422605,
> 0.0398196823378306, -0.389219867379597, -0.00269176292387149,
> 0.553663817786709, 0.00803266728255501, 0.470621010682895,
-0.389219867379597,
> 0.0531985700905557, -0.00966390653254687, 0.948851286517476,
> 0, -0.0889303986002686, -0.289482205789089, 0.470621010682895,
> -0.620322188497616, -1.33981685878991, 0.0183827591576367,
0.011135182844728,
> -0.0638533091192526, 2.32607985155626, -0.138083520720171,
0.00471455153770216,
> 0.158058381916342, 0.00450504854498247, 0.0789824876681455,
0.0704699239866158,
> -2.19086590383429, 0.0809155162971262, -0.0638533091192526,
0.0329404929656065,
> 0.0281676116282727, -0.389219867379597, 0.012790919597435,
-0.00704771101800125,
> 0.0403529797537856, 0.0558406758822688, 0.164832137315436,
-0.165567865123191,
> -0.11103429903157, -0.0355024172803945, 9.48260587090123e-05,
> 0.470621010682895, -0.0495357136064147, 0.229802002983503,
0.0637860580674806,
> -0.620322188497616, -0.0226657756569641, -0.389219867379597,
> -0.316625748304681, 0.229802002983503, 0, 0.364124775102099,
> -0.0310987139252845, 0.492424057922772, -0.224535737231339,
-0.133435578504748,
> 0.229802002983503, 0.184389526960601, -3.97960671764283, 0.223470481648489,
> -0.620322188497616, 1.57339312469411, -3.97007919079201, 0.028292556618311,
> -0.0208634007145496, 0.253055735744466, -0.0638533091192526,
> -1.93884051014153, 0.0301349400625612, -0.0638533091192526,
0.000295057056987376,
> 0, 0.286160612098488, 0.101207913446722, 0.374419900839882,
-0.106217410937095,
> 0.229802002983503, 2.31067381143729, 2.09201022549168, 0.00385297198146129,
> 0.0512938203984638, -1.74049624153457, 0.426702921643898,
-0.0638533091192526,
> 0.018935028523515, 0.23126745462646, 0.00767373530818363,
0.229802002983503,
> 3.84024898682852, -0.0638533091192526, 0.389584248100691,
0.0449003257302091,
> 1.02228506672615, 0.229802002983503, -0.0638533091192526,
-0.0829134652872339,
> 3.50596545804498, -0.389219867379597, 0.9170368554337, -0.0638533091192526,
> 0.393117195150408, 0.228802985129773, 0.380899253549764, 0.232617830598094,
> -0.389219867379597, 0.0459161417216973, 1.31722638132631,
-0.151301202089443,
> -0.116990991708309, 0.927131393095724, 0.287762794679405, 0.53782819173468,
> -0.389219867379597, 0, 0.778671412967675, -0.389219867379597,
> -0.0683403974328925, 0, 0.229802002983503, 0.473035927661744,
> -0.620322188497616, 0.994155024290692, 0.229802002983503,
0.470621010682895,
> -0.194201456791898, 0.735175033053973, 0, 8.3894395202509,
-2.71421951365695,
> 1.63476338054133, 0, -0.358533993792374, -0.180900357181005,
> 0.464964929465083, 0.828110705634323, 0.290014059095831,
0.0265807736784206,
> 0.913325706925416, -0.620322188497616, 0.482569085367064, 0,
> 0.999426501553857, -0.0638533091192526, -0.894190901951266,
0.0608976332239153,
> -0.389219867379597, 0.000920175777920006, 0.0444241832790267,
> -0.389219867379597, 1.77775509259178, 0.00731201645980821, 0,
> -0.620322188497616, 0.229802002983503, 5.07464022484589, 1.48600912617683,
> 0.037030406316896, 5.19861898546793, 0.614580107047209, 0.140671508556198,
> -0.0638533091192526, 0.470621010682895, 1.44599607789379,
0.229802002983503,
> 0.0337669838054181, -0.339507807487096, -0.227604499761264,
-0.0126140839785072,
> 0.329583322374931, -0.348480271857373, 0.229802002983503,
0.220851780815745,
> -0.00466286305694716, 0.470621010682895, 1.94004188027446,
0.00769634829635375,
> 0.229802002983503, 0.229802002983503, -0.0638533091192526,
0.00196933273638366,
> 0.362886861307995, -0.010895368171175, 0.00517992475169629,
0.0121875763733234,
> 0.229802002983503, -0.389219867379597, -0.000556322059116982,
> 0.229802002983503, 0.00260711445755056, -0.58609877956866, 0,
> 0.173845846564558, 0.050042474875399, -0.608356727049781, 1.29406201978428,
> -0.0207947874733201, 0.00589643228835565, 0.720668560955405,
> -0.0638533091192526, 0.0325689306223551, -0.620322188497616,
> -0.389219867379597, -0.0638533091192526, -0.620322188497616,
> 0.0384932081048732, -0.0349291605765668, 0.00798065241516178,
> -0.134723236994354, -0.0638533091192526, 0.281152548562933,
0.785134308633961,
> 0.00911501343278954, 0.0290625580516694, 0.229802002983503,
0.0364502381509222,
> 0.0200267754432485, 0.470621010682895, -2.30392713054924,
0.0133977174531081,
> 0.0313438687192373, -0.453629796591262, -0.444456614744397,
0.470621010682895,
> -0.00419309963021769, 0.229802002983503, 0.781666390558601,
0.263209713357162,
> -0.00288720581609739, 0.0157812058748433, 0.377266856994834,
> 0.211102246795362, -0.0244674117557579, 0.502934845080243,
0.470621010682895,
> -0.620322188497616, 0.119508324298399, 0.68156448564652,
-0.389219867379597,
> 0.344388633359758, 0.541519544456095, 0.348203898915403,
-0.617865773083779,
> -0.620322188497616, -0.389219867379597, -0.630469325697215,
-0.389219867379597,
> -0.00185171176208817, 0.470621010682895, -0.0638533091192526,
> 0.0384110765023374, -0.476268477810135, 0.0275459003440332,
-0.377613497242655,
> 0.480114279740138, 0.208177472628734, 0.0388621060580001,
0.314810488790625,
> -0.389219867379597, 0.622343433254446, 0.229802002983503, 0,
> 0.0116064532794852, 0.640880718848922, 0.0159256710348949,
0.0294218642201815,
> -0.11922554805783, 0.470621010682895, 0.0719964703043177,
0.176673405801693,
> -0.216160070123196, -0.620322188497616, 0.263287565296575,
0.334468720690456,
> -0.389219867379597, -0.389219867379597, 0, -0.0638533091192526,
> -0.0638533091192526, 0.328005934417359, 1.98345092754637,
-0.0638533091192526,
> -0.322569885555602, 0.343583272797935, -0.0131035846556284,
-0.0638533091192526,
> 0.332049938227108, 0.229802002983503, -0.184471568949188,
0.0738083137554319,
> 0.295094806935004, 2.00072915211246, 0.0524057350651284,
-0.394994587233133,
> 0.11082820395266, 0.0470433275207449, -0.0244714107059427,
-0.19392136026585,
> -0.389219867379597, 1.54447845601115, 0, 1.50461847711675,
0.470621010682895,
> -2.19230689436821, -2.15372326763204, 0.0602893383146939,
-0.350076259362557,
> -0.389219867379597, -0.0491349223300808, -0.347427839125497,
> -0.125793370606986, -0.389219867379597, 0.218492017287635,
-0.389219867379597,
> -2.19203559916863, 0.470621010682895, -0.0756276343860818,
-0.620322188497616,
> 0.039618360679447, 0.229802002983503, 0.342229794086586, 1.22342842687211,
> -0.0638533091192526, -0.389219867379597, 0, -0.121360237566266,
> 0.470621010682895, 0.203522177713664, -2.66081323726908, 0.164981226545032,
> 0.208989371873146, 0.178977127763616, 0.00534834375159016,
0.0259183781780568,
> -0.0638533091192526, -0.620322188497616, 3.77342257919255,
0.077694414226668,
> -0.0638533091192526, -2.76001789665019, 0.93498899883197,
0.229802002983503,
> 0.229802002983503, -0.189889234701173, -0.878128024239223,
0.229802002983503,
> -0.971246200836784, 0.00238384747429768, -0.620322188497616,
> 0.440261892604354, 3.76354782684596, 0.470621010682895, 3.86172131986622,
> 0.575298756860043, 12.9023010859722, 0.470621010682895, 0.378503973417637,
> 0.474891582933229, 0, -0.389219867379597, 0.520087612011093,
> 0.00160600701629905, -1.70670322718237, 0.229802002983503,
-0.0349116284595025,
> -0.389219867379597, 0.229802002983503, -0.0638533091192526,
0.0138641669555371,
> -1.76999545498462, 0.470621010682895, -0.0638533091192526,
0.470621010682895,
> 0.568835467760944, 0.196290116211879, 0.00657090150018764,
1.15108667563071,
> 0.229802002983503, 1.39616453144586, -0.0847185084207546,
-0.063387618790934,
> 0.470621010682895, 0.111214507604595, -0.0859882232308096,
0.229802002983503,
> 0.00453833599472268, 0.334589717726727, 0.470621010682895,
-0.390600326717378,
> 0.254343160688718, -0.951335732362531, -0.0638533091192526,
-0.389219867379597,
> 0.185995171841162, -0.0638533091192526, 0.0161178324221534,
-0.702070844948495,
> -0.466435025160672, 0.470621010682895, 0.470621010682895,
-0.383876151221017,
> -0.0638533091192526, -0.0638533091192526, 0.470621010682895,
> -0.389219867379597, -0.0123155655016255, -0.386709341729674,
> 0.229802002983503, -0.620322188497616, 0.187872106293471, 1.0998198175547,
> 0.229802002983503, -0.0111456829865045, -0.620322188497616,
-0.620322188497616,
> 0.0484181771965215, 0.29713373197861, 1.03416257683562, 0.470621010682895,
> -1.14286511426204, -0.620322188497616, -0.620322188497616,
3.57860778510592,
> 0.229802002983503, -0.62520946847561, 0.290707988341369,
0.0924839451700828,
> -0.292199030679553, 0.275232409230032, -0.0884019891746591,
-0.613845322077624,
> 0.470621010682895, 0.27263770155515, 0.229802002983503, 0.470621010682895,
> -0.616577036861926, -0.0638533091192526, 0.229802002983503,
0.103227620279027,
> 0.000325827725882409, -0.389219867379597, -0.0213033086486025,
> 1.1517268134498, -0.0027549233829829, -5.20036700047062,
-0.389219867379597,
> 1.38009140442044, 0.188112123387496, -0.389219867379597,
-0.0715310034898503,
> 0.229802002983503, -1.42113754281828, 0.0671280483594289,
-0.866540256758301,
> -0.389219867379597, -0.389219867379597, 0.112435457850701,
-0.162158911168545,
> 0.470621010682895, 0.470621010682895, 0.0211915910476394,
-0.00153721649859708,
> -0.0638533091192526, -0.102776844490052)
>
>> dput(HM2)
> c(0.016497438441392, -0.0121005433105642, 0.0340103138875006,
> 0.0393128837416979, 0.144718671661076, 0.0775923152157973,
0.000894372752462123,
> 0.0129080340603581, -0.0022179741964203, 0.0540058630486591,
> 0.0383234745402589, -0.0142841740056228, -0.0113383036972718,
> 0.00764362896437113, 0.022570207227843, 0.0892462240318431,
0.060498120257716,
> 0.0432525311181986, 0.00222557516581898, 0.0493381989550945,
> -0.0116459907029527, -0.112480015005373, 0.0182691285457092,
> 0.0248597234825647, 0.00754701511666922, 0.0471476327719148,
> 0.0625841102244406, 0.0303698631973417, 0.00781124380799404,
> -0.0168950573556397, 0.0473901805181147, 0.00740505106540693,
> -0.0152639817574294, 0.00916841478852549, 0.0409730632910991,
> 0.0625866632066982, 0.00664005076885597, 0.0103946833001679,
> 0.0243728672440622, 0.0722309706115829, 0.0174699387206196,
-0.088714507487996,
> -0.00504535647738195, 0.00927272338803572, -0.00707755664004029,
> 0.209001332673238, 0.0280975011236682, 0.0185107628508926,
-0.0152895488479284,
> 0.0293166958720994, 0.0839281669393395, 0.0350355281775659,
-0.0214691529922399,
> -0.00698847060167527, 0.069853381162298, 0.00880702674287574,
> 0.0440111442331915, 0.0576762465158807, 0.0180025302908308,
0.0104372279684426,
> 0.0399937793788931, 0.0484415593089806, 0.0359627022827372,
0.0610406756211853,
> 0.0400425377047152, 0.00783749255154968, 0.0033626359803225,
> 0.0253846624900874, 0.028956317299215, 0.0220327419434368,
0.0055491218235435,
> 0.021359789760335, 0.0053563472471669, 0.00770764128276149,
0.120606533813112,
> 0.0338481150043749, 0.00480652155775551, -0.0208260153687132,
> 0.0264346940874102, 0.0254170849175835, 0.0549828722223003,
-0.0197153554154837,
> 0.0146319132316291, 0.0223773253300461, 0.046744336162787,
0.0439389840326429,
> 0.0730303072697907, 0.0157399337823011, 0.0189220332073482,
0.0332902036920697,
> -0.00629466834494764, 0.0674012192688983, 0.0200657055355507,
> 0.0101015050127517, 0.0425927774526406, 0.0282767872201141,
0.00648039037553307,
> 0.0515174537352363, 0.128342038159934, 0.0432170296083376,
0.01871577325763,
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>
>
> very many thanks for your time and effort...
> yours sincerely
>
> AKSHAY M KULKARNI
>
>
> ________________________________________
> From: R-help <r-help-bounces at r-project.org> on behalf of akshay
kulkarni <akshay_e4 at hotmail.com>
> Sent: Wednesday, March 20, 2019 1:32 PM
> To: R help Mailing  list
> Subject: [R] problem with nlsLM.....
>
> dear members,
>                              Yesterday, Duncan identified a silly mistake
in an nls call...in the list of starting values, one of the names of the
variable was getting repeated. But I am experiencing the same problem again,
with a different formula:
>
>> formulaDH3
> HM1 ~ (a + (b * ((HM2 + 0.3)^(1/3)))) * (c * log(HM3 + 27))
>
> here HM1 is the response variable, and HM2 and HM3 are predictors.....
>
>> nonlin_modDH3 <- nls(formulaDH3, start = list(a = 0.43143, b =
0.68173,c = 0.02954))
> Error in nlsModel(formula, mf, start, wts) :
>   singular gradient matrix at initial parameter estimates
>> nonlin_modDH3 <- nlsLM(formulaDH3, start = list(a = 0.43143, b =
0.68173,c = 0.02954))
> Error in nlsModel(formula, mf, start, wts) :
>   singular gradient matrix at initial parameter estimates
>
> I am using nlsLM function from the minpack.lm package which says that it
will converge when nls fails with singular gradient matrix error...
>
>
> Is there again a silly mistake(pardon me again if there is one!), or is the
problem serious? If it is serious, any pointers towards a solution?
>
> very many thanks for your time and effort....
> yours sincerely,
> AKSHAY M KULKARNI
>
>         [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>