[R] extract positions from matrix

Hi everyone, I tried to solve this problem but I could not find the solution. I have about 105 matrices of equal size in the memory of**R, I need to do is extract from these matrices some known positions and create a new matrix with these columns. Show you an example with only three matrices

[R] tuning random forest. An unexpected result

Dear Researches, I am using RF (in regression way) for analize several metrics extract from image. I am tuning RF setting a loop using different range of mtry, tree and nodesize using the lower value of MSE-OOB mtry from 1 to 5 nodesize from1 to 10 tree from 1 to 500 using this paper as refery

[R] Predicting response from new curves using fda package

Basically all I want to do is predict a scalar response using some curves. I've got as far as doing a regression (using fRegress from the fda package) but have no idea how to apply the results to a NEW set of curves (for prediction). I have N=536 curves, and 536 scalar responses. Here's what

[R] help

hello mr martin i need the program of lower incomplet Gamma function, and i dont know any thing about mathematica, my gamma function is Y(1/2,r^2/4*teta), r is variable. pleasr help me, its emmidiate for me. all the best somaye node [[alternative HTML version deleted]]

Re: [R] Spatial Statistics using R

Thanks a lot for the guidance. I will take a look at these options. Ravi -- View this message in context: http://r.789695.n4.nabble.com/Spatial-Statistics-using-R-tp4079092p4082354.html Sent from the R help mailing list archive at Nabble.com. __

Re: [R] building biOps on macports, and configure--vars

Please don't ask non-R programming questions on R-help. This is best asked on R-sig-mac, including details of how you built your R. But the short answer is not to mix macports with the CRAN build of R. And there are matching libs for CRAN's build at http://r.research.att.com/libs/ On Thu,

[R] Fisher Exact Test

This mean First, I am no expert but I am analyzing some marketing data. I have information on two versions of the same site, and I have data on the number of times people filled out a form on each version of the site. Sample data: Site 1 Site 2

Re: [R] Adding a year to existing date

Hi On 17/11/11 17:33, arunkumar wrote: Hi I need to add an year to and date field in the dataframe. Please help me X Date 1 2008-01-01 2 2008-02-01 3 2003-03-01 I can't find anything built in. This is probably because year is an ill-defined unit; years vary in

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