I have this kind of bed file :
chr1 39630894 39631095 + chr1 158409432 158409633 + chr10 75600726 75600927 + chr13 10359410 10359611 + chr13 10448814 10449015 + chr13 64450832 64451033 + chr14 110276447 110276648 +
I need to add a first column with a unique identifier in order to annotate this file using Homer.
Adding the column is not the problem, but I don't know how to create a column with a unique id such as peaks_X with X being the line number of my bed file for example.
I thought of using a for loop, but it's not that easy in unix. I can retrieve the number of line with wc -l, but I don't know how to set the condition : add from 1 to wc -l file.bed
Anyone see an easy way to do this with unix, perl, or anything ?