[R] convert data.frame to parameters

[Charles Annis]

Yup.  You saved the day with "assign."  Works like a champ.  Thanks too for the "do.call" suggestion.  It turns out, however, that I'm using all these objects (parameters) in a more complex code, and not a single function call.

Thanks again! 

Charles Annis, P.E.

Charles.Annis at StatisticalEngineering.com
http://StatisticalEngineering.com
561-352-9699

-----Original Message-----
From: Bert Gunter [mailto:gunter.berton at gene.com] 
Sent: Monday, October 7, 2013 9:37 AM
To: Charles Annis
Cc: Duncan Murdoch; r-help at r-project.org
Subject: Re: [R] convert data.frame to parameters

1. ?assign is what you're looking for, I think.

2. But I would guess that you do not need to do this. As a further guess, see ?do.call for creating a function call that you can give a list of arguments/parameters.

Cheers,
Bert

On Mon, Oct 7, 2013 at 6:07 AM, Charles Annis <charles.annis at statisticalengineering.com> wrote:
> Sorry for using "parameters" when I meant "objects."  I also wasn't 
> sufficiently clear about what I'm trying to do.
>
> Your suggestion produces a single object, "parameters."  What I want 
> are 26 objects, a , b, c, ... whose values are df$values, which in my 
> case are numeric.
>
> Thanks.
>
> Charles Annis, P.E.
>
> Charles.Annis at StatisticalEngineering.com
> http://StatisticalEngineering.com
> 561-352-9699
>
> -----Original Message-----
> From: Duncan Murdoch [mailto:murdoch.duncan at gmail.com]
> Sent: Monday, October 7, 2013 8:04 AM
> To: Charles Annis
> Cc: r-help at r-project.org
> Subject: Re: [R] convert data.frame to parameters
>
> On 07/10/2013 7:56 AM, Charles Annis wrote:
>> Greetings:
>>
>> I have a 24 row,  2-column csv file.  The first column is character, 
>> with the names of parameters.  The second column is numeric, 
>> containing the parameter values.
>>
>> I can produce a 2-column data.frame with  case.study.parameters <-
>> read.csv(...)
>>
>> I want to convert the data.frame to 24 parameters having those names 
>> and their associated numeric values.
>>
>> I've tried using package "ParamHelpers" with no success.  Likely 
>> because it really isn't intended for that purpose.
>>
>> Can anyone help?
>
> You say you want "parameters", but that's not an R type.  So here's 
> one way, but it might not be what you're looking for.
>
> df <- data.frame(names=letters, values=1:26) parameters <- df$values
> names(parameters) <- df$names
>
> Duncan Murdoch
>
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-- 

Bert Gunter
Genentech Nonclinical Biostatistics

(650) 467-7374