Re: Faster and more efficient way to read a file vertically

This is a perl one-liner doing just what you want:

$ echo 'ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA
> ACATCACCTCCCACAACGAGGACTACACCATCGTGGAACA' | perl -nE 'say substr($_,
+ 10, 1);'
C
C
C
C
C
C
C
C
C
C
C
C
C
[download]

Check, though, that 10 is the right second parameter for substr, you may have to change it depending on which character you want exactly.

Comment on Re: Faster and more efficient way to read a file vertically Download Code

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Re^2: Faster and more efficient way to read a file vertically by dbuckhal (Chaplain) on Nov 03, 2017 at 22:50 UTC
another one-liner: `$ perl -F'' -anE 'say $F[9]'`	[reply] [d/l]