[R] how to use do.call("rbind", get(list(mlist)))

[Berton Gunter]

Roger:

Please re-read ?get, where it says that the x argument must be a single
character string name, not a list.You must first create the list using get
and then call do.call on that list:

do.call("rbind",lapply(mlist,get))

-- Bert Gunter
Genentech Non-Clinical Statistics
South San Francisco, CA
 
"The business of the statistician is to catalyze the scientific learning
process."  - George E. P. Box
 
 

> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of roger bos
> Sent: Friday, January 21, 2005 9:07 AM
> To: r-help at stat.math.ethz.ch
> Subject: [R] how to use do.call("rbind", get(list(mlist)))
> 
> I have around 200 data frames I want to rbind in a vectorized way. 
> The object names are:
> 
> m302
> m303
> ...
> m500
> 
> So I tried:
> 
> mlist <- paste("m",302:500,sep="")
> dat <- do.call("rbind", get(list(mlist)))
> 
> and I get "Error in get(x, envir, mode, inherits) : invalid 
> first argument"
> 
> I know "rbind" is valid because 
> 
> dat <- rbind(m302, m303, m304, m305)
> 
> works, I am just too lazy to type it out to m500.
> 
> I also tried it without the get() portion, but then dat ends up being
> a column with just the names of the objects, not the objects
> themselves.
> 
> Thanks in advance for showing me the errors in my attempts.
> 
> Roger
> 
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