cut and columns

[mikblack]

In: workshop_material/4_inspectmanipluate.md

When doing this sort of stuff:

grep -v "^#" Mus_musculus.GRCm38.75_chr1.gtf | cut -f1-8 | head -n3

It would be good to get people to take a look at the first few rows of the Mus_musculus.GRCm38.75_chr1.gtf file so they can see what the header rows look like.

[murraycadzow]

just before sort comes in, a good addition would be to include how to automatically number the lines after doing grep -v "^#" Mus_musculus.GRCm38.75_chr1.gtf | head -1 | tr '\t' '\n'

This could either be with nl or perhaps expanded on in the awk material as an example of when you might use NR e.g. grep -v "^#" Mus_musculus.GRCm38.75_chr1.gtf | head -1 | tr '\t' '\n' | awk '{print NR $0}', This is an extremely useful code snippet so that you can quickly know the column number(s) of what you want to extract out with cut or awk