st: how to create a vector from the column names of a matrix

[Nathan Danneman <ndanneman@gmail.com>]

Hi,

As a portion of a larger program, I would like to create a vector
containing the names of each column of a matrix, using each column's
number.  This is essentially the opposite of the rownumb command,
which takes the row's name, and returns its row number.

Thanks,
Nathan

-- 
"Imagination is more important than knowledge..."
      -- Albert Einstein
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