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Hello DearI used modifiedmk package for trend analyses.this is my script ?require(modifiedmk)X1<-read.table("c:/elham/first article/r/Spring_NDVI-1.txt",skip=2,header=FALSE)d=dim(X1) outMK<-matrix(-999,nrow=4,ncol=d[2])for (c in

Dear I have a data.frame, and want to fit a constrained non-linear model: data: x y -0.08 20.815 -0.065 19.8128 -0.05 19.1824 -0.03 18.7346 -0.015 18.3129 0.015 18.0269 0.03 18.4715 0.05 18.9517 0.065 19.4184 0.08 20.146 0 18.2947 model: y~exp(a)*(x-m)^4+exp(b)*(x-m)^2+const I try to use nls() and set start=list(a=1,b=1,c=1,m=1), but which always give me a error message that

Hi Elham, The error message: Error in if (S == 0) { : missing value where TRUE/FALSE needed means that for at least one S, the value is missing. The best advice I can give you is to load the data frame X1 as in your code above, and try something like: which.na<-function(x) return(which(is.na(x))) sapply(X1,which.na) You will then get a list of the positions of any NA values in X1. Jim On

Hello again, I'm not attempting an install of Samba 3.0.4 from source. I want to specifically compile in ads and winbindd support. So, I already compiled and installed OpenLDAP 2.2.13. Now the configure script is hung on krb5 dependancy: checking for krb5.h... no configure: error: Active Directory cannot be supported without krb5.h So I downloaded and attempted compile of krb5 1.3.4, but