Hi Allie,
On Aug 21, 2009, at 11:47 AM, Alexander Shenkin wrote:
Hello all,
I have a list which I'd like to convert to a data frame, while
maintaining control of the columns' data types (akin to the colClasses
argument in read.table). My numeric columns, for example, are getting
converted to factors by as.data.frame. Is there a way to do this, or
will I have to do as I am doing right now: allow as.data.frame to
coerce
column-types as it sees fit, and then convert them back manually?
This doesn't sound right ... are there characters buried in your
numeric columns somewhere that might be causing this?
I'm pretty sure this shouldn't happen, and a small test case here goes
along with my intuition:
R> a <- list(a=1:10, b=rnorm(10), c=LETTERS[1:10])
R> df <- as.data.frame(a)
R> sapply(df, is.factor)
a b c
FALSE FALSE TRUE
Can you check to see if your data's wonky somehow?
-steve
--
Steve Lianoglou
Graduate Student: Computational Systems Biology
| Memorial Sloan-Kettering Cancer Center
| Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact
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