[R] Create Strings of Column Id's

[Tom.O]

Great, That did the trick,thanks.

regards Tom


jholtman wrote:
> 
> Is this what you want:
> 
>> paste("-", paste(colnames(MyMatrix)[COL], collapse='-'), sep='')
> [1] "-E-T"
> 
> 
> On 7/26/07, Tom.O <tom.olsson at dnbnor.com> wrote:
>>
>> Does anyone know how this is don?
>>
>> I have a large matrix where I extract specific columns into txt files for
>> further use. To be able to keep track of which txt files contain which
>> columns I want to name the filenames with the column Id's.
>>
>> The most basic example would be to use an for() loop together with
>> paste(),
>> but the result is blank. Not even NULL.
>>
>> this is the concept of thecode i use:
>>
>> for example
>>
>> MyMatrix <-
>> matrix(NA,ncol=4,nrow=1,dimnames=list(NULL,c("E","R","T","Y")))
>> COL <- c(1,3) # a vector of columns I want to extract,
>>
>> Filename <- NULL # the starting variable, so I can use paste
>> Filename <- for(i in colnames(MyMatrix)[COL])
>> {paste(Filename,"-",i,sep="")}
>>
>> The result is "-T", but I want it to be "-E-T"
>>
>> Anyone have a clue?
>>
>> Thanks Tom
>>
>>
>> --
>> View this message in context:
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>> Sent from the R help mailing list archive at Nabble.com.
>>
>> ______________________________________________
>> R-help at 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
>> and provide commented, minimal, self-contained, reproducible code.
>>
> 
> 
> -- 
> Jim Holtman
> Cincinnati, OH
> +1 513 646 9390
> 
> What is the problem you are trying to solve?
> 
> ______________________________________________
> R-help at 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
> and provide commented, minimal, self-contained, reproducible code.
> 
> 

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