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

Use "&" instead of "&&"

On Mon, Jun 27, 2011 at 6:01 PM, Nanami 13
<deconstructed.morning at gmail.com> wrote:

Hi everyone,

I am trying to find a way to filter a table; If I am given for  
example the
following table:

head(intra)

  chr miRNA   start     end strand              ACC              
hsa_ID
region region_start region_end   gene_id transcrip_id
1 chr1 miRNA 1102484 1102578      + ACC="MI0000342"; ID="hsa- 
mir-200b";
exon      1102484    1102578 NR_029639    NR_029639
2 chr1 miRNA 1103243 1103332      + ACC="MI0000737"; ID="hsa- 
mir-200a";
exon      1103243    1103332 NR_029834    NR_029834
3 chr1 miRNA 1104385 1104467      + ACC="MI0001641";  ID="hsa- 
mir-429";
exon      1104385    1104467 NR_029957    NR_029957
4 chr1 miRNA 3044539 3044599      + ACC="MI0015861"; ID="hsa- 
mir-4251";
exon      3044539    3044599 NR_036215    NR_036215
5 chr1 miRNA 3477260 3477354      - ACC="MI0003556"; ID="hsa- 
mir-551a";
exon      3477260    3477354 NR_030277    NR_030277
6 chr1 miRNA 6489894 6489956      - ACC="MI0015864"; ID="hsa- 
mir-4252";
exon      6489894    6489956 NR_036218    NR_036218

I would only like to keep in the table the rows that have intra 
$start !=
intra$region_start and intra$end != intra$region_end.
I've tried using this but I get the following error:

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

intra$region_end)]

head(intra)

data frame with 0 columns and 6 rows

Thank you,

best,
Nanami

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-- 
Jim Holtman
Data Munger Guru

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