[R] Input to variables - help please

Luc Villandre villandl at dms.umontreal.ca
Wed May 13 22:39:23 CEST 2009


Steve Sidney wrote:
> Hi Luc
>
> Many thanks for the suggestions.
>
> I will take a look at them as soon as I can.
>
> Are the functions standard or are they part of a function and if so 
> which one?
>
> Regards
> Steve
> ----- Original Message ----- From: "Luc Villandre" 
> <villandl at dms.umontreal.ca>
> To: "Steve Sidney" <sbsidney at mweb.co.za>
> Cc: <r-help at r-project.org>
> Sent: Wednesday, May 13, 2009 10:10 PM
> Subject: Re: [R] Input to variables - help please
>
>
> Steve Sidney wrote:
>> Dear list
>>
>> I have managed to write a short program to evaluate data which is 
>> inputted
>> from a csv file using the following
>>
>> x = read.csv("wms_results.csv", header=TRUE)
>>
>> All works fine but since I have a number of similar data files which 
>> have
>> different names, I would like the program to allow me to input the file
>> name, rather than having to edit the program.
>>
>>> From the documentation I am unclear how to replace the 
>>> "filename.csv" with a
>> string varaiable so that from the keyboard I can input the name.
>>
>> Also which command can I use to output some text to the monitor as a 
>> prompt
>>
>> Any help would be great and apologies for such a simple question. Thanks
>>
>> Regards
>> Steve
>>
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>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
> Hi Steve,
>
> I suspect the choose.files() function could be useful in this setting.
> Also, I've read on this forum that message() or cat() were commonly used
> for a prompt (all taken from Prof. Brian Ripley's reply to "Prompt comes
> too late").
>
> Hope this helps,
>
Are you asking if they are part of a non-default package? If so, then 
the answer is no: all these functions are included in packages that come 
bundled with a regular installation of the latest version of R (base and 
utils).

Cheers,
-- 
*Luc Villandré*
/Biostatistician
McGill University Health Center -
Montreal Children's Hospital Research Institute/



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