[R] compare strings

Bernd Jagla baj2107 at columbia.edu
Sat Dec 1 04:47:59 CET 2007


It helps writing down these question, you are then getting much closer to an
answer...

summary(as.integer(t3[,2]) == as.integer(t3[,4]) & as.integer(t3[,3]) ==
as.integer(t3[,5]))

will compare two pairs of column pairs and give a count of flase and true
rows...

-B

|-----Original Message-----
|From: r-help-bounces at r-project.org [mailto:r-help-bounces at r-project.org] On
|Behalf Of Bernd Jagla
|Sent: Friday, November 30, 2007 10:25 PM
|To: r-help at r-project.org
|Subject: [R] compare strings
|
|Sorry for the question, but I really cannot find the right search terms to
|find an answer..
|
|
|
|I have a data frame with strings in some of the columns.
|
|I want to know all the rows where the strings in both columns are equal.
|
|
|
|How do I do this?
|
|
|
|Thanks,
|
|
|
|Bernd
|
|
|	[[alternative HTML version deleted]]
|
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