Hi there,

I am trying to write a script that filters out irrelevant information.

My file contains information in this format:

>hsa_circ_0067224|chr3:128345575-128345675-|NM_002950|RPN1 FORWARD

-4.4.. 6 .. 17 xxxxxxxxxxGTGAC CAGT ATGC ACTG AAGATGAGGTTTGTG

-0.9.. 5 .. 18 xxxxxxxxxxxGTGA CCAGT ATGC ACTGA AGATGAGGTTTGTGG

None.. 1 .. 20 xxxxxxxxxxxxxxx GTGACCAGTATGCACTGAAG ATGAGGTTTGTGGAC

I am trying to filter out all the lines beginning with 'None'. But the tricky part which I don't know how to go about doing is filtering out the lines which begin with a value which is greater than the value which the user has inputted in <STDIN>, because even if I capture the first 4 characters with a regex. This captured value does not directly correspond to a numerical value so I can't compare it to the <STDIN> value for filtering purposes. Is there another way I can go about doing this?

In reply to Easiest way to filter a file based on user input by Peter Keystrokes

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