[R] scale of gamma distribution

Dear All: If y~Ga(a,b) What's about the (n-1)y~Ga(a, (n-1)b), is this right? Many Thanks [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the po

[R] OPTIM--non finite finite different [13]

-623478636.8236478 Then the iter 20 vlaue suddelnly changes to a negative value and in the end the error mesage is "non finite finite different [13]" Has any one have this experience of what the wrong is? Thanks! Xin My function is: function (parameters,y,x1,x3) { alpha<-parameter

[R] How to export data to Excel Spreadsheet?

a" "b" "f" [5,] "a" "b" "g" I used cat(comb3,file="c:\comb3.xls",fill=FALSE,sep="\n"). The probelm is that all of data in Excel is in one column. How to let the data list as matrix. Even I used mcomb3<-matr

[R] Combination (a large numbers)

n is just same letter in the row. Actually, I don't need that. Anyone can help on this? Thanks Xin [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEA

[R] Why the contrain does not work for selecting a particular range of data?

ay is I want to use one program for getting results of the different range of data. Anyone can help? Please! Thanks! Xin Shi My Estimation function for way two is : function (parameters, y, x1,x2) { nx1 <- length(x1); nx2 <- length(x2); ny <- length(y); x1 <- matri

[R] Why the contrain does not work for selecting a particular range of data?

cond way is I want to use one program for getting results of the different range of data. Anyone can help? Please! Thanks! Xin Shi [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailma

[R] ifelse command

1>0 & x2==2, L<-lgamma(y+p)+p*(log(p)-log(mu+p))+y*(log(mu)-log(mu+p))-lfactorial(y)-lgamma(p) ) else if(y>0 & x1>0 & x2==3, L<-lgamma(y+p)+p*(log(p)-log(mu+p))+y*(log(mu)-log(mu+p))-lfactorial(y)-lgamma(p) ) else L

[R] Why different results with different initial values for MLE (optim)!

Hi, All: I used optim() to minimise likelihood function for fitting the data to a partiuclar distribution. The function is converged and the value of log-likelihood is different when I change the intial value. Whether it means the program does not work well? Thanks! Xin

[R] r-help@stat.math.ethz.ch

) to see them). Could you give some advice please? Thanks a lot! Xin Shi [[alternative HTML version deleted]] __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

[R] rw2001 RMA in GeenSpring "Error in sigToEnv"

ssage: Incompatible phenoData object. Created a new one. in: read.affybatch(filenames = files) Which information I should provide furthur or the latest version of R has some bugs? Thanks a lot! Xin LIU This e-mail is from ArraDx Ltd The e-mail and any files transmitted with it are con

[R] different result from the same errorest() in library( ipred)

.0467 > errorest(Species ~ ., data=iris, model=randomForest, estimator = "cv", > est.para=control.errorest(k=3), mtry=2)$err [1] 0.0533 > errorest(Species ~ ., data=iris, model=randomForest, estimator = "cv", > est.para=control.errorest(k=3), mtry=2)$e

[R] leave-one-out cross validation for randomForest

Dear all, Can I get the leave-one-out cross validation error of randomForest in R? I only found tune(), which got the 10-fold cross validation error. Thanks for any information. Xin LIU This e-mail is from ArraDx Ltd The e-mail and any files transmitted with it are confidentia

[R] About ROC curves

Hi, Dear all R users: Does someone know whether R can calculate the Receiver Operating Characteristic (ROC) Curves? I didn't find it from the packages. Thanks a lot. --- Xin __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r

Re: [R] New trellis settings

Hi, Dear all R users: Does someone know whether R can calculate the Receiver Operating Characteristic (ROC) Curves? I didn't find it from the packages. Thanks a lot. --- Xin __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r

[R] (no subject)

Dear all R users and helpers: I wonder whether there is a library call trees ( classification trees) in R? If there is, where can download it? Thank you very much. Xin Qi __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help

[R]: a package problem

What I used is R 2.0.0 version now. What should I do? Thank you very much. Xin __ [EMAIL PROTECTED] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

[R] how to use biplot to show PC1 and PC3 or else?

hello: I am trying to use biplot show relationship between PC1 and PC3 of princomp. There is example showing how to do it with PC1 and PC2. But I am totally out of idea for PC1 and PC3. Thanks very much for your kind help. Best Wishes, yours, xin

[R] newbie question on clustering performance

is hot. Thanks in adavance, Xin Gong __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html

[R] pdf function assignment (beginner's question)

hi, how can I assign a pdf function (not the standard stats distribution, and quite complex, exponential calculations involved) and plot its cdf curve in R? thanks! __ [EMAIL PROTECTED] mailing list https://www.stat.math.ethz.ch/mailman/listinfo/r-he

[R] how could I add legends?

Hi All, I plotted several distribution curves in one graph but I do not know how to add legends say which is what distribution. Could someone help me? Thanks, __ [EMAIL PROTECTED] mailing list http://www.stat.math.ethz.ch/mailman/listinfo/r-help