[R] how to generate argument from a vector automatically

hi netters i have a vector NAMES containing a series of variable names: NAMES=c(x,r,z,m,st,qr,.nn). i wanna fit a regression tree by using the code: my.tree-tree(y~x+r+z+m+nn,my.dataframe) but i don't want to type out x+r+z+m++nn one by one, as there are so many

[R] learning decision trees with one's own scoring functins

Hi netters, I want to learn a decision tree from a series of instances (learning data). The packages tree or rpart can do this quite well, but the scoring functions (splitting criteria) are fixed in these packages, like gini or something. However, I'm going to use another scoring function.

[R] Are there any R packages that can deduce causal relationship between variables?

Hi netters. Assume Y = {Y1,.Yn} and X = {X1..Xm}, where Yi and Xi are random variables that can take on discrete values from V={0,1,2}. Each Yi in Y has some (0-k) parent variables in X, which means given the values of the parent variables (Xi0Xik) the values of Yi is set. Yi =

[R] (no subject)

hi netters: I have a series of discrete variables which form a network and I want to learn the network structure from some training data. I could have used packages like deal but there are two problems. First of all, I have 1 variables. So the possible network structure is awfully huge,

Re: [R] learning networks with a large number of variables and pre-set parents.

. Thank you. From: Achim Zeileis [EMAIL PROTECTED] To: zhihua li [EMAIL PROTECTED] CC: r-help@stat.math.ethz.ch Subject: Re: [R] learning networks with a large number of variables and pre-set parents. Date: Fri, 25 Mar 2005 11:40:46 +0100 (CET) This is the second time within 24 hours that you cross

Re: [R] learning networks with a large number of variables and pre-set parents.

I have 100 cases. So i think the dimension is (100, 1). The PC has a pentium 4 CPU with 512M memory. I don't know if it is enough? From: Christian Schulz [EMAIL PROTECTED] To: zhihua li [EMAIL PROTECTED] CC: r-help@stat.math.ethz.ch Subject: Re: [R] learning networks with a large number

[R] install R under suse: packages dependency

where I can download and install these packages? Thanks a lot! Zhihua Li __ 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

Re: [R] install R under suse: packages dependency

interface. My local machine is a mac, I don't know if that's the problem. From: Fran�ois Pinard [EMAIL PROTECTED] To: zhihua li [EMAIL PROTECTED] CC: r-help@stat.math.ethz.ch Subject: Re: [R] install R under suse: packages dependency Date: Wed, 3 May 2006 21:24:24 -0400 [zhihua li] I'm trying

Re: [R] install R under suse: packages dependency

even though I launched the yast2 ncurses, I couldn't use it. As for the installation sources, you meant suse or r? Zhihua Li From: Larry Howe [EMAIL PROTECTED] To: r-help@stat.math.ethz.ch Subject: Re: [R] install R under suse: packages dependency Date: Wed, 3 May 2006 22:40:28 -0400

[R] manipulating dataframe according to the values of some columns

hi netters, I'm a newbie to R and there are some very simple problems puzzeled me for two days. I've a dataframe here with several columns different in modes. Two of the columns are special for me: column 1 has the mode factor and column 2 has the mode numeric vectors. The values for column 1

[R] how to singlify entries

hi netters I have a rather simple question. I have a data frame with two variables X and Y, both of which are factors. X has 100 levels while Y has 10 levels only. The data frame has 100 rows in all, so for X the values are unique, and Y has many replicate values. Now I wanna reduce the

[R] how to count associated factors?

hi netters Suppose I have a factor X, with 10 elements and 3 levels: A B B C A C B A C C . It is easy to count the number of elements for each level: tapply(X,X,length). Now I have another factor Y, which formed a matrix with X: X| A B B C A C B A C C Y| B B C C C A A A B B I wanna count

[R] quotient and remainder

hi netters Is there a function in R that can compute the quotient and remainder of a division calculation? such that when 11 is given as the dividend and 5 the divider, the function returns 2(quotient) and 1(remainder). Thanks a lot!

Re: [R] quotient and remainder

[EMAIL PROTECTED] To: zhihua li [EMAIL PROTECTED] CC: r-help@stat.math.ethz.ch Subject: Re: [R] quotient and remainder Date: Thu, 23 Jun 2005 09:01:08 +0200 11%/%5 [1] 2 11%%5 [1] 1 Best, Dimitris p.s., I'd suggest you to take a look at the An Introduction to R doc Dimitris Rizopoulos

[R] a silly question on index of a matrix

Hi netters, This is probably a silly question,but I can't find the answer after searching the R-help archives online. ok, I have a matrix. I know there is a 10 somewhere in it. Now I want to know the index of the element 10 in this matrix. That is, if X[i,j]=10, I want to know i and j. Is

[R] how to subset rows using regular expression patterns

hi netters, i have a dataframe A with several columns(variables). the elements of column M are character strings. so A$M=c(ab,abc,bcd,ac,abcd,fg,.fl). i wanna extract all the rows where A$M match some regular expression pattern. for a simple example, let the pattern be just ab, i wanna

[R] how to change a dataframe with characters to a numeric matrix?

hi netters, i have a dataframe TEST like this: Y1 Y2 Y3 X1 4 7 8 X2 6 2 Z X3 8 0 1 i would like to change it to a numeric matrix, replacing Z with NA Y1 Y2 Y3 X1 4 7 8 X2 6 2 NA X3 8 0 1 i've tried the function data.matrix but it didn't work. is there any easy way to

[R] store and retrieve object names in a vector

hi netters, suppose i have a series of objects X1, X2, B1,C1... they all have the same dimensions. i want to combine into one by using cbind: y-cbind(X1,X2,B1,C1.) but i don't want to type the names of these objects one by one. instead, i've put their names into a vector:

[R] rJava installation under linux: configuration failed

something I should do that I didn't? Thanks a lot! Sincerely Yours: Zhihua Li __ 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] working with R graphics remotely

Hi netters, Now I'm connecting from my local windows machine to a remote linux machine and launch R out there using SSH. When I tried to create grahics, like using plot or heatmap, I cannot see the output. Maybe a new R window displaying the graphics has popped out in the remote machine? Or I

[R] memory error with 64-bit R in linux

Hi netters, I'm using the 64-bit R-2.5.0 on a x86-64 cpu, with an RAM of 2 GB. The operating system is SUSE 10. The system information is: -uname -a Linux someone 2.6.13-15.15-smp #1 SMP Mon Feb 26 14:11:33 UTC 2007 x86_64 x86_64 x86_64 GNU/Linux I used heatmap to process a matrix of the

Re: [R] memory error with 64-bit R in linux

it wrong? Thanks a lot! From: jim holtman [EMAIL PROTECTED] To: zhihua li [EMAIL PROTECTED] CC: r-help@stat.math.ethz.ch Subject: Re: [R] memory error with 64-bit R in linux Date: Wed, 18 Jul 2007 17:50:31 -0500 Are you paging? That might explain the long run times. How much space are your

[R] Error: evaluation nested too deeply when doing heatmap with binary distfunction

Hi netters, I have a matrix X of the size (1000,100). The values are from -3 to +3. When I tried heatmap(X, distfun=function(c),dist(c,method=bin),hclustfun=function(m),hclust(m,method=average)) I got the error message: Error: evaluation nested too deeply: infinite recursion /

Re: [R] Error: evaluation nested too deeply when doing heatmap with binary distfunction

Sorry, that was a typo. Actually there wasn't a comma after 'function(m)' in my expression. So I'll try to increase the threshould to see if that works. Thanks a lot! From: jim holtman [EMAIL PROTECTED] To: zhihua li [EMAIL PROTECTED] Subject: Re: [R] Error: evaluation nested too deeply

Re: [R] Error: evaluation nested too deeply when doing heatmap with binary distfunction

Yes. After I increase the threshould to 1 it got through. Thanks a lot! From: Uwe Ligges [EMAIL PROTECTED] To: zhihua li [EMAIL PROTECTED] CC: r-help@stat.math.ethz.ch Subject: Re: [R] Error: evaluation nested too deeply when doing heatmap with binary distfunction Date: Thu, 19 Jul 2007