Unix has several utilities for performing relational algebra-like operations on streams (grep, join, cut, additional things with awk). Is there a grouped aggregate utility readily available (or ...
I used comm to compare two sorted files. Each line in these files are positive integer numbers. But the results show comm: file 1 is not in sorted order comm: file 2 is not in sorted order How ...
I'd like to filter through a text file and only print the lines where each column is a valid floating point number. For example: 3 6 2 -4.2 21.2 3 x 4.2 21.2 3 2 2.2.2 Only the first line would ...