Roger --
First, if you have the data frames in a list already, you can just use
those; no need to bother with the names. If the data frames are all
separate, but you have the names, you can first create a list of the data
frames themselves:
do.call("rbind", lapply(mlist, get)) # assumes they're in the workspace
An example:
> temp1 <- matrix(runif(10), 5, 2)
> temp2 <- matrix(-runif(10), 5, 2) (for easy identifiability)
> temp3 <- do.call("rbind", lapply(c("temp1", "temp2"), get))
> temp3 <- do.call("rbind", list(temp1, temp2)) (same as above)
Hope this helps,
Matt Wiener
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of roger bos
Sent: Friday, January 21, 2005 12:07 PM
To: r-help@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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