Off topic:Filter table in R based on the number of chromosomes

Question

[mostafarafiepour]

Hi all,

I have a table like this:

CHROM   POS     N_ALLELES       N_CHR   M.F          A.Freq
CM009840.1      932     2       14      0               1
CM009840.1      1096    2       84      0.357143        0.642857
CM009840.1      1107    2       32      0.84375         0.15625
CM009840.1      1177    2       74      0.445946        0.554054
CM009840.1      1276    2       64      0.640625        0.359375
CM009840.1      1295    2       68      0.632353        0.367647
CM009840.1      1471    2       48      0.770833        0.229167
CM009840.1      1518    2       52      0.192308        0.807692
CM009840.1      1527    2       48      0.875           0.125

I want to filter this table by the column N_CHR. The filter's basis is to remove rows smaller than 30.

for example: In the first row, there is number 14, So, i want to remove this row. And so for all the rows.

What is the best idea?