create a new data frame after comparing two columns of the previous data frame

Right. You forgot the comma!

-- 
David.

On Jun 27, 2011, at 7:10 PM, Nanami wrote:

it's a table; I read it from a file; I've tried to make it look 
prettier:

head(intra)

chr   miRNA   start     end       strand              ACC
hsa_ID           region region_start region_end
chr1 miRNA 1102484 1102578      +   ACC="MI0000342"; ID="hsa- 
mir-200b";
exon      1102484    1102578
chr1 miRNA 1103243 1103332      +   ACC="MI0000737"; ID="hsa- 
mir-200a";
exon      1103243    1103332
chr1 miRNA 1104385 1104467      +   ACC="MI0001641";  ID="hsa- 
mir-429";
exon      1104385    1104467
chr1 miRNA 3044539 3044599      +   ACC="MI0015861"; ID="hsa- 
mir-4251";
exon      3044539    3044599
chr1 miRNA 3477260 3477354      -   ACC="MI0003556"; ID="hsa- 
mir-551a";
exon      3477260    3477354
chr1 miRNA 6489894 6489956      -   ACC="MI0015864"; ID="hsa- 
mir-4252";
exon      6489894    6489956


When I changed && with &  I got this error:

new <- intra[(intra$start != intra$region_start )&(intra$end !=
intra$region_end)]

Error in `[.data.frame`(intra, (intra$start != intra$region_start) &
(intra$end !=  :
 undefined columns selected

What I would like to do is to create a new table that only contains 
the rows
for which column start and region_start are not the same.



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David Winsemius, MD
West Hartford, CT