[R] question

[Greg Snow]

?ifelse

-- 
Gregory (Greg) L. Snow Ph.D.
Statistical Data Center
Intermountain Healthcare
greg.snow at imail.org
(801) 408-8111
 
 

> -----Original Message-----
> From: r-help-bounces at r-project.org 
> [mailto:r-help-bounces at r-project.org] On Behalf Of Armelini, Guillermo
> Sent: Wednesday, December 19, 2007 10:21 AM
> To: r-help at stat.math.ethz.ch
> Subject: [R] question
> 
> Hello everyone!
>  
> Is anybody can help me to solve this silly question that 
> unfortunately I haven't found the right way to address it.
>  
> Supose I have a matrix X[n,n] dimension
>  
> I would like to calculate the product of the vectors
>  
> Y=X[1,n]*X[n,1]
>  
> Then I would like to run the following operation
>  
> H=if(Y>0) {H[,1]=1}
>  
> The problem is that the condition "if" works only for the 
> first element of the matrix.
>  
> Does anybody knows how to apply the conditional "if" to a 
> entire vector?
>  
> cheers
>  
> Guillermo
>  
> 
> 
> This message has been scanned for viruses by TRENDMICRO, an 
> IESE technology affiliate company  and global leader in 
> antivirus and content security software.
> 
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide 
> http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>