On Jul 21, 2009, at 1:47 PM, Mehdi Khan wrote:
Hello all,
I have a seemingly simple question which I have searched for an
answer for
for a few hours without luck. I have a matrix of both values and
characters
with thousands of rows. I would like to run a search of this matrix
for
certain values and would like the search to retrieve the entire
row. How
would I accomplish this?
Oh, values! Woops
Like so?
df <- data.frame(nums=1:10, words=c("Abelonian",
"abeltree",
"Abencerrages",
"abenteric",
"abepithymia",
"Aberdeen",
"aberdevine",
"Aberdonian",
"Aberia",
"aberrance"))
evens <- df$nums %% 2 == 0
df[evens,]
You can build such an indexing vector (like evens) in a number of
different ways to suite your problem.
-steve
--
Steve Lianoglou
Graduate Student: Physiology, Biophysics and Systems Biology
Weill Medical College of Cornell University
Contact Info: http://cbio.mskcc.org/~lianos/contact
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