This is probably a trivial one:
I have a file (my.file) with these lines:
>h1_c1
>h1_c2
>h1_c3
>h2_c1
>h2_c2
>h2_c3
and I want to change it in place to be:
>c1_h1
>c2_h1
>c3_h1
>c1_h2
>c2_h2
>c3_h3
I thought this ought to do it:
sed -i 's/\(\>\)\(h1\)\(\_\)\(.*\)/\1 \4 \3 \2/g' my.file
sed -i 's/\(\>\)\(h2\)\(\_\)\(.*\)/\1 \4 \3 \2/g' my.file
but it doesn't seem to work. How do I do it?
The obvious sed for your example is:
$ sed -i~ -e 's/^>\(h[0-9]\)_\(c[0-9]\)/>\2_\1/' *.foo
I tested this and it works for your example file.
Try this awk
awk -F">|_" '{print ">"$3"_"$2}' my.file > tmp && mv tmp my.file
awk -F">|_" '{print ">"$3"_"$2}' my.file
>c1_h1
>c2_h1
>c3_h1
>c1_h2
>c2_h2
>c3_h2
You can try this sed,
sed 's/>\(h[1-2]\)_\(.*\)/>\2_\1/' yourfile
(OR)
sed -r 's/>(h[1-2])_(.*)/>\2_\1/' yourfile
kent$ sed -r 's/>([^_]*)_(.*)/>\2_\1/' f
>c1_h1
>c2_h1
>c3_h1
>c1_h2
>c2_h2
>c3_h2
you add -i if you want it to happen "in-place"
c3_h2noth3