Hello,

I am trying to read lines from a CSV file with the following format: 

SEQ PRD   H     E     C
 S   C  0.000 0.021 0.979
 L   C  0.000 0.050 0.950
 F   C  0.000 0.117 0.883
 E   C  0.003 0.250 0.747

[download]

Each of the items per line are seperated by a tab.

I want to read the first two Single characters in each line. (Ex: S and C in line 2, L and C in line 3, etc.) I have written the code as follows: 

if ($csv_line =~ /SEQ+/)
{
print "Header of Predictions \n";
}
elsif ($csv_line =~ /(\d)\t(\d)\t(\d.d{3})\t(\d.d{3})\(\d.d{3})/)
{
push @ProteinSeq, $1;
push @Prediction, $2;
print "Amino acid is: ".$1." and Prediction is: ".$2." \n";
}

[download]

Could anyone kindly help me write the second regular expression properly (in the elseif statement)? I am still not entirely comfortable with regular expressions and I know this is not written correctly because I can't save $1 and $2.

Thanks in advance! InfoSeeker

In reply to Regular Expression Problem by Anonymous Monk

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