Displaying 8 results from an estimated 8 matches for "swts".
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2010 Mar 08
2
fit a gamma pdf using Residual Sum-of-Squares
...17, 26, 60, 94, 128, 137, 128, 77, 68, 65, 60, 51, 26, 17, 9, 5, 2, 3, 7, 3)
I have typed the following code, using nls method:
fit <- nls(y ~ (1/((s^a)*gamma(a))*x^(a-1)*exp(-x/s)), start = c(s=3, a=75, x=86))
But I have the following message error (sorry, this is in German):
Fehler in qr(.swts * attr(rhs, "gradient")) :
Dimensionen [Produkt 3] passen nicht zur Länge des Objektes [23]
Zusätzlich: Warnmeldung:
In .swts * attr(rhs, "gradient") : Länge des längeren Objektes
ist kein Vielfaches der Länge des kürzeren Objektes
Could anyone help me with the code?
I wou...
2007 Nov 30
2
nls and discontinuous functions
...ow is a simple example:
f <- function (t,k,l,u) { r0<-346.1 x<-t-l if (x<0) r0 else (r0-u)*exp(-k*x)+u }prof1<-read.table("c:\\data.txt", header=TRUE)results<-nls(y1~f1(t,k,l,u), data=prof1, start=list(k=0.05, l=4, u=154))
Errors I am getting are:
Error in qr(.swts * attr(rhs, "gradient")) : dims [product 3] do not match the length of object [10]In addition: Warning messages:1: In if (x < 0) r0 else (r0 - u) * exp(-k * x) + u : the condition has length > 1 and only the first element will be used2: In if (x < 0) r0 else (r0 - u) * exp(-k...
2008 May 07
3
function in nls argument
...d E as to
minimize the function output with the following:
optim.model<-nls(nulldat ~ optim.fun(ST04, SM08b,
ch2no, a, b, d, E), data=tower,
start=list(a=-0.003,b=0.13,d=0.50, E=400), na.action =
na.exclude )
were nulldat=0
At this point I get the following error message:
Error in qr.default(.swts * attr(rhs, "gradient")) :
NA/NaN/Inf in foreign function call (arg 1)
Warning messages:
1: In if (na.rm) x <- x[!is.na(x)] else if
(any(is.na(x))) stop("missing values and NaN's not
allowed if 'na.rm' is FALSE") ... :
the condition has length > 1 and only...
2011 Sep 19
0
nls picewise FvCB model
...-exp(19.02-38.83/(R*(Tleaf+273.15)))
? ?O <-210
? ?ge<-min( ?(Vcmax*(Ci-Gstar))/(Ci+(Kc*(1+(O/Ko))))
,(J*(Ci-Gstar))/((4*Ci)+(8*Gstar)) ?) -Rd
? ?ge
? ?}
m<- nls(A ~ rhs(Ci, Vcmax, J, Rd), data=GE, start = list(Vcmax=50,
J=150, Rd=4), trace = T)
And get the following error:
Error in qr(.swts * attr(rhs, "gradient")) :
?dims [product 3] do not match the length of object [10]
In addition: Warning messages:
1: In min(x) : no non-missing arguments to min; returning Inf
2: In max(x) : no non-missing arguments to max; returning -Inf
3: In .swts * attr(rhs, "gradient") :
?...
2009 Sep 04
1
How should a SelfStart function handle illegal parameter values?
...om nls [e.g. nls(y~SSmodel(x, pars...), ...)] those
non-values lead to errors such as (but not limited to):
Error in numericDeriv(form[[3L]], names(ind), env) :
Missing value or an infinity produced when evaluating the model
or (if I provide a gradient attribute)
Error in qr.default(.swts * attr(rhs, "gradient")) :
NA/NaN/Inf in foreign function call (arg 1)
I can't see a way of making nls either stick to legal parameter values, or
accept NA/NaN/Inf as indicating "bad" parameter values.
I really do want to use nls rather than a bounded optimisation t...
2012 Jan 25
1
solving nls
...#39;, 'm'), # parameter names
+ function(lN0, k, t, m){} # arguments for result
+ )
> regresjon2<-nls(lcfu~model(lN0, k, t, m), data=cfu_data, start=(list(lN0 =
> 7.6, k = -0.08, m = 2)), control=nls.control(maxiter=50000,
> minFactor=1/1000000000000000000))
Error in qr.default(.swts * attr(rhs, "gradient")) :
NA/NaN/Inf in foreign function call (arg 1)
I have many datasets, but here is one as an example:
t lcfu
0 7.344108507
1.0625 7.166004379
1.958333333 7.317609443
3.722222222 7.099456839
6.847222222 7.009846065
16.95833333 6.7143479
28.90625 6.086498408
37...
2009 Sep 21
1
How to use nls when [selfStart] function returns NA or Inf??
...om nls [e.g. nls(y~SSmodel(x, pars...), ...)] those
non-values lead to errors such as (but not limited to):
Error in numericDeriv(form[[3L]], names(ind), env) :
Missing value or an infinity produced when evaluating the model
or (if I provide a gradient attribute)
Error in qr.default(.swts * attr(rhs, "gradient")) :
NA/NaN/Inf in foreign function call (arg 1)
A toy example demonstrating my problem (legal values of param are >1):
#-----------
SSexample<-selfStart(
model=function(x, param) x^log(param-1),
initial = function(mCall, data, LHS){
val<- 1.001...
2012 Oct 11
1
nls NAs
...new space such that warmnoNA<-warming$T10cm!="NA") but
with no success. With the original code above, get the following error:
Error in numericDeriv(form[[3L]], names(ind), env) :
Missing value or an infinity produced when evaluating the model
In addition: Warning message:
In .swts * (lhs - rhs) :
longer object length is not a multiple of shorter object length
Any ideas?
Thanks,
Elizabeth
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