feature request: choose separation character in matrix-export

[MigAP]

Hello,

I think it could be helpful to choose the character used to separate the values in the function matrix-export. This would allow to export to CSV, TSV... Here is a proposition:

;;@returns: **void**, writes **matrix** `mat` values, separated by **character** `sp`, in the file with relative path (**string**) `str`.
(define (matrix-export str mat sp)
  (define (export-mat)
    (apply column-foreach (lambda row
                            (let rho [(lst row)]
                              (if (empty? lst) (newline)
                                               (begin
                                                 (display (head lst))
                                                 (when (not (empty? (tail lst))) (display sp))
                                                 (rho (tail lst))))))
                          (matrix-data mat)))
  (with-output-to-file str export-mat #:text))

Thank you in advance.

Cheers,
Miguel

[gramian]

Hi,
that would be a useful extension indeed. I will add it for the next version.
Thanks!