Choose columns and sub-sequences

choose [-o outfile -l# -x# -m# -c#[,#] -V# -h] file

-l number of values to be read (all)
-x number of values to be skipped (0)
-m number of columns to be read (1)
-c columns to be read (1)
-o output file name, just -o means file_select
-V verbosity level (0 = only fatal errors)
-h show this message
Reads a column from a file starting at -x +1 and writes -l values. Output file file_select.
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