scan(pipe("sed -e s/,$// data2"), sep=",")For the rest of this comment, see the R site search. hope this helps. spencer graves
Yong Wang wrote:
Samir, can you give an example for the use of sed?
On Sun, 30 May 2004, Samir Mishra wrote:
If the data file is in text format, is large with a lot of "."s, use sed. It's MUCH faster than any other tool for this sort of thing.
-----Original Message----- From: Yong Wang [mailto:[EMAIL PROTECTED] Sent: Sunday, May 30, 2004 05:25 To: [EMAIL PROTECTED] Subject: [R] how to remove "." or replace it with NA?
Hi,all
a quick question
A larger file include many"." (stands for missing value) for variable, say, x. after
read in the file and assign it another name such as :
x1<-data$x
but x1 is always a facotor but not numerical.
so How can I get a numeric vector from the read in data frame. how can I replace those "." with "NA" to perform analysis.
thank you very much best regards
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