[R] Reading parameters from dataframe and loading as objects

[Francois Pepin]

Hi,

assign is your friend here:
apply(data,1,function(x)assign(x[1],x[2],envir = .GlobalEnv))

As a note, you probably don't want to use data as a variable because it overwrites the data function, leading to unwanted side-effects if you ever use it.

Cheers,

François Pepin
Scientist
 
Sequenta, Inc.
400 E. Jamie Court, Suite 301
South San Francisco, CA 94080
 
650 243 3929 p
 
francois.pepin at sequentainc.com
www.sequentainc.com
 
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On Nov 3, 2011, at 23:24 , Aher wrote:

> Hi List,
> 
> I want to read several parameters from data frame and load them as object
> into R session, Is there any package or function in R for this?? 
> 
> Here is example
> 
> param <-c("clust_num", "minsamp_size", "maxsamp_size", "min_pct", "max_pct") 
> value <-c(15, 20000, 200000, 0.001, .999) 
> data <- data.frame ( cbind(param , value))
> data
>         param       value
> 1    clust_num     15
> 2 minsamp_size    20000
> 3 maxsamp_size   2e+05
> 4      min_pct      0.001
> 5      max_pct     0.999
> 
> My data contains many such parameters, I need to read each parameter and its
> value from the data and load it as objects  in R session as below:
> 
> clust_num  <-   15
> minsamp_size  <-20000
> maxsamp_size <-2e+05
> min_pct <-0.001
> max_pct <-0.999
> 
> The way right now I am doing it is as creating as many variables as
> parameters in the data frame and one observation for value of each
> parameter.  
> example:
> clust_num	minsamp_size	maxsamp_size	min_pct	max_pct
> 15	20000	200000	0.001	0.999
> 
> data$ clust_num  , data$minsamp_size,  .....
> 
> Is there any better way for doing this?
> 
> 
> --
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> 
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