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thanks everyone!

I have a data set that has 4 columns, I want to know if I can delete duplicate lines while ignoring one of the columns, for example


10 chr1 ASF 30
15 chr1 ASF 20
5 chr1 ASF 30
6 chr2 EBC 15...

Hey drewk,

I realized I could process them once at a time especially after I ran out of memory, before, all I wanted to do was to open it all at once instead of writing switch or if-else...

i have a file that contains information about genes and I need to obtain the sequences upstream and downstream these genes and do analysis on that. These 19 files are the chromosome sequences. I have...

thanks for the reply, sorry for not being clear, all 19 files need to be opened simultaneously =/

I have a question regarding Perl scripting.

If I want to say open files that all look like this and assign them to a filehandle and then assign the filehandle to a variable, how do I do this?
...