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3
votes
4answers
637 views
Grouped aggregate utility (like SQL GROUP BY)?
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 ...
4
votes
1answer
667 views
comm: file is not in sorted order
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 ...
2
votes
3answers
112 views
Print only lines that are completely numeric
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 ...
