Displaying 19 results from an estimated 19 matches for "so4".
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2009 Apr 20
7
Fitting linear models
I am not sure if this is an R-users question, but since most of you here
are statisticians, I decided to give it a shot.
I am using the lm() function in R to fit a dependent variable to a set
of 3 to 5 independent variables. For this, I used the following
commands:
>model1<-lm(function=PBW~SO4+NO3+NH4)
Coefficients:
(Intercept) SO4 NO3 NH4
0.01323 0.01968 0.01856 NA
and
>model2<-lm(function=PBW~SO4+NO3+NH4+Na+Cl)
Coefficients:
(Intercept) SO4 NO3 NH4
Na Cl
-0.0006987 -0.0119750 -0.0295042 0....
2011 Nov 09
4
Interpreting Multiple Linear Regression Summary
I would appreciate pointers on what I should read to understand this
output:
summary(lm(TDS ~ Cond + Ca + Cl + Mg + Na + SO4))
Call:
lm(formula = TDS ~ Cond + Ca + Cl + Mg + Na + SO4)
Residuals:
ALL 1 residuals are 0: no residual degrees of freedom!
Coefficients: (6 not defined because of singularities)
Estimate Std. Error t value Pr(>|t|)
(Intercept) 125 NA NA NA
Cond...
2011 Oct 27
2
Syntax Check: rshape2 melt()
...want to ensure that
the melt() function call is syntactically correct.
The unmodifed data frame is organized this way:
head(tds.anal)
site sampdate param quant
1 UDS-O 2006-12-06 TDS 10800
4 STC-FS 1996-06-14 Cond 280
7 UDS-O 2007-10-04 Mg 1620
9 UDS-O 2007-10-04 SO4 7580
19 JCM-10B 2007-06-21 Ca 79
20 JCM-10B 2007-06-21 Cl 114
What I want looks like this:
site sampdate TDS Cond Mg Ca Cl Na SO4
UDS-O 2006-12-06 10800 NA 1620 NA NA NA 7580
with the actual data for each param, of course.
I've read the resha...
2011 Oct 24
2
Syntax Help for xyplot()
...1.00
BC-2 :107 1st Qu.:1994-09-21 Cl :148 1st Qu.: 14.03
BC-1 : 62 Median :1996-05-21 Cond: 94 Median : 64.40
BC-4 : 38 Mean :1998-11-19 Mg : 65 Mean : 189.47
BC-1.5 : 28 3rd Qu.:2002-10-31 Na : 34 3rd Qu.: 285.75
BC-0.5 : 12 Max. :2011-05-18 SO4 :155 Max. :2058.00
(Other): 11 TDS :157 NA's : 8.00
a sample of the data in burns.tds.anal is:
burns.tds.anal
site sampdate param quant
82 BC-0.5 1996-06-02 SO4 194.00
83 BC-0.5 1996-06-02 TDS 530.00
6903 BC-2 1994-07-25 Cond...
2011 Nov 02
2
Proper Syntax for Logical Subset in Subset()
...A NA NA NA NA NA NA ...
$ Na : num NA NA NA NA NA NA NA NA NA NA ...
$ Ni : num NA NA NA NA NA NA NA NA NA NA ...
$ OH : num NA NA NA NA NA NA NA NA NA NA ...
$ P : num 0.03 NA NA NA NA NA NA NA NA NA ...
$ Pb : num NA NA NA NA NA NA NA NA NA NA ...
$ SO4 : num 175 57 194 NA NA NA NA NA NA NA ...
$ Sb : num 0 NA NA NA NA NA NA NA NA NA ...
$ Se : num 0.01 NA NA NA NA NA NA NA NA NA ...
$ Si : num NA NA NA NA NA NA NA NA NA NA ...
$ TDS : num 460 212 530 NA NA NA NA NA NA NA ...
$ TSS : num NA 26 NA NA...
2011 Sep 13
1
ZOO: Learning to apply it to my data
...: num 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0.01 0 ...
The numeric column ('x' in zoo, I believe) is associated with the unique
combination of param, sampdate, and stream in each row. For example:
tail(streamdata)
stream sampdate param quant
11164 Winters 2010-06-30 SO4 120.000
11165 Winters 2010-06-30 Zn 0.010
11166 Winters 2011-06-06 As 0.005
11167 Winters 2011-06-06 Cl 5.000
11168 Winters 2011-06-06 SO4 150.000
11169 Winters 2011-06-06 Zn 0.010
I'm in the early exploratory stage of understanding these data, but want
to produce time...
2012 Jan 09
1
Different lm() Residuals Output
All but one of the summaries of multiple linear regressions in this
analysis set present the residuals by min, 1Q, median, 3Q, and max. Example:
lm(formula = TDS ~ Cond + Ca + Cl + Mg + Na + SO4, data = snow.cast)
Residuals:
Min 1Q Median 3Q Max -277.351 -32.551 -2.621
40.812 245.272
The one that doesn't has only a small number of rows (23) and presents the
results as:
lm(formula = TDS ~ Cond + Ca + Cl + Mg + SO4, data = rnchH.cast)
Residuals:
8...
2011 Oct 31
1
reshape2: Lost Values Between melt() and dcast()
...both data frames have the values in their .melt data frames:
summary(jerritt.melt)
site sampdate param variable
JCM-1 :2178 Min. :1978-03-28 pH : 292 quant:7519
JCM-20A:2149 1st Qu.:1996-05-24 As : 286
JC-E : 476 Median :2000-05-31 SO4 : 271
JC : 400 Mean :2001-02-04 TDS : 271
GD-1 : 395 3rd Qu.:2006-05-31 Cl : 253
JC-2 : 349 Max. :2009-12-30 Zn : 250
(Other):1572 (Other):5896
value
Min. : 0.000
1st Qu.: 0.005
Median : 0.650
Mean : 31...
2012 Jun 06
0
R-help Digest, Vol 112, Issue 6
Rich,
The documentation for cenboxplot states that the second argument must be
logical and not integer. the function cenboxplot substitutes synthetic
values for censored values using ros, hence the error message from the ros
method.
I also do not understand how you expect group = 'SO4' to work. It is not
clear that the function will replicate 'SO4' to make a single group.
Dave
> Date: Tue, 5 Jun 2012 09:58:16 -0700 (PDT)
> From: Rich Shepard <rshepard@appl-ecosys.com>
> To: r-help@r-project.org
> Subject: [R] NADA Applied to my Data
> Message-I...
2011 Jan 10
3
Help with Data Transformation
...0.9
2269 LHR020GW-01E2 N WG INO BRLS NONE E300 PO4 ND 50
2270 LHR020GW-01E2 N WG INO BRLS NONE E300 SO4 = 22460
2272 LHR020GW-01E2 N WG MET BRLS FLDFLT E1631 HG = 0.00171
2273 LHR020GW-01E2 N WG MET B...
2011 Nov 29
5
Why Numeric Values Become Factors in Data Frame
...;Ca'|'Cd'|'Cl'|'Co'|'Cr'|'Cu'|'DO'|'Fe'|'Hg'|'K'|'Mg'|'Mn'|'Mo'|'Na'|'NH4'|'NO3-NO2'|'Oil-grease'|'Pb'|'pH'|'Sb'|'SC'|'Se'|'SO4'|'Sr'|'TDS'|'Tl'|'V'|'Zn'
'D-1'|'2007-12-12'|0.000|0.106|1.000|231.000|231.000|0.011|0.000|0.002|0.000|100.000|0.000|1.430|0.000|0.006|0.024|4.960|4.110|NA|0.000|9.560|0.035|0.000|0.970|0.010|0.293|NA|0.025|7.800|0.001|630.000|0.001|65.800...
2011 Jan 13
0
Help with Data Transformation - RESOLVED
...GEXTORG","HGNONMOB""HGSEMIMOB","K",
"MEHG","MG","MN","MO","NH3N","NI","NO2N","NO3","NO3N","PB""PO4","S","SB","SE","SO4",
"SOLID","SSC","TL","TOC","V","Zn","ZN"
- These are currently stored in the "PARLABEL" column.
* For each sample ID I would like to create a single line;
- Extract each "PARLABEL" to use as a...
2012 Jun 05
0
NADA Applied to my Data
...to first learn is how to specify a box plot (and whether I can
use the lattice package) for specific chemicals.
?cenboxplot shows me the arguments, but I'm not entering them correctly, or
there's a prerequisite step I need to take:
cenboxplot(waterchem$quant, waterchem$ceneq1, group='SO4', log=T, range=1.5)
Error in function (classes, fdef, mtable) :
unable to find an inherited method for function "ros", for signature
"numeric", "integer"
Perhaps cenboxplot is looking for a separate data set and not a data
frame? Or, perhaps I need to melt...
2013 Apr 30
1
vegan -varpart is bigger than 100% in total?
...possible? What might be the reason? Thank you
library(vegan)
gotud <- decostand(gotu,"hell")
G.var <- varpart(gotud,~Depth,~CH4_oxidation,~d13C_DIC+Temperature+Spec.Conductivity+DO+CH4+N2O+pH, data=ge)
plot(G.var)
Sample depth T SpCond DO pH Chl CH4 CH4oxidation N2O TA POC BP SO4
Gi25Feb12 25 24.46 1104 4.42 8.94 1.6 40.00174578 1.1 6.683260809 12.723 41.98069543 0.008282072 150.1168
Gi27.5Fb12 27.5 24.42 1105 4.36 8.93 1.2 68.53538846 1.4 7.431459607 12.711 31.4397919 0.020730967 188.4166
Gi30Fb12 30 23.71 1128 2.62 8.81 1 10.53158545 0.9 8.415644664 12.817 23.06912467...
2012 Jan 02
1
Creating ZOO Matrix from Data Frame
...s "BC-0.5","BC-1",..: 1 1 1 2 2 2 2 2 2 2
$ sampdate : Date, format: "1996-04-19" "1996-05-21" ...
$ Ca : num 76.6 NA NA NA NA ...
$ Cond : num 712 403 731 NA NA NA NA NA NA NA ...
$ HCO3 : num 162 152 212 NA NA NA NA NA NA NA ...
$ SO4 : num 175 57 194 NA NA NA NA NA NA NA ...
$ TDS : num 460 212 530 NA NA NA NA NA NA NA ...
...
What I think I need is a matrix that orders sampdate, has the numeric
values for TDS, and retains the factor of site (so that I can compare TDS
values on a given date by site). The Aug...
2001 Nov 05
1
Problem to transfer Splus functions
...wt <- wt/sum(wt)
mx <- wt %*% x
xx <- t(t(x) - as.vector(mx))
rwt <- sqrt(wt)
y <- rwt * xx #.. integration des poids..
stdx <- sqrt(diag(t(y) %*% y))
if(ctr)
x <- xx
x <- t(t(x)/stdx)
dimnames(x) <- nam
attr(x, "std") <- stdx
x
}
ca mg cl so4 hco3 co2 c te deb
62.8 3.5 1.75 27.5 173 2.93 300 10.40 0.092
62.8 4.0 1.65 27.0 177 2.92 300 10.40 0.490
64.5 3.6 1.65 28.5 179 3.10 303 10.40 0.560
64.0 5.0 1.70 26.0 184 3.33 308 10.40 0.605
61.6 5.0 1.90 28.0 178 3.08 303 10.40 0.690
63.5 4.4 1.75 27.5 179 2.76 302 10.50 0.7...
2012 Sep 04
1
cenboxplot(): Reporting Limit Twice Correct Concentration
...ot", "MnDis", "MnTot", "MoDis", "MoTot",
"N", "NH4", "NaDis", "NaTot", "NiDis", "NiTot", "PDis", "PTot",
"PbDis", "PbTot", "SC", "SO4", "SbDis", "SbTot", "SeDis",
"SeTot", "SrDis", "SrTot", "TDS", "TSS", "TlDis", "TlTot",
"Vdis", "Vtot", "ZnDis", "ZnTot", "oilgrease",...
2012 Aug 22
1
Error in if (n > 0)
...ot", "MnDis", "MnTot", "MoDis", "MoTot", "N",
"NH4", "NaDis", "NaTot", "NiDis", "NiTot", "PDis", "PTot",
"PbDis", "PbTot", "SC", "SO4", "SbDis", "SbTot", "SeDis",
"SeTot", "SrDis", "SrTot", "TDS", "TSS", "TlDis", "TlTot",
"Vdis", "Vtot", "ZnDis", "ZnTot", "oilgrease",...
2009 Jul 23
1
[PATCH server] changes required for fedora rawhide inclusion.
...2G>s`u=z(Svdp&SKNvLas`
zSY_Jw4-OALC*gN1o8%R+=d^YsTxbjJO%j2MhdgEbW+3g2JGDOPvnFgwZQO-EdC<7+
zl^dhGc4dPrl>SNJmBpl)6daebZBW^SzgE at d7*cPvW@(*4dWO$fZC(wD-P7P$UJbr4
zI%azdu%|aO>2Y<jVZN#GdK=+dx1wTEL(U<Dn%kiDhc2tqfH|(+%Vl6+0XIZ2Gg?^^
zlJBFQh`EXj5fAEG- at Or6GLlVhy6L8qeNO1iEg_2^XY7>SO4fz$R(7D81A7XnV=8%w
z;Ykr1TuA<rnqYCh&eN?w#-CtIyTg>v(z0QAu)ql;yb3X-O8QFBB4MDH6>4N&;(@xS
zEMafbHBqy*km3ButmNz&yH9;>j7>w&b-KDyzPjIrO%inxl!|L#ht8-Dv3Eb8AdfEc
zyRNS6I4qfdf$N--gjE8BQx8CFUuB-CFyX)78{qYOI2t^;M}D&<oDb%7IbFtNCnRLK
z-67)|(l}!r(B&;SfzZG)5tW2KQe7B%^~*?yFs...