GNU Guile 2.0.5.123-4bd53
Copyright (C) 1995-2012 Free Software Foundation, Inc.

Guile comes with ABSOLUTELY NO WARRANTY; for details type `,show w'.
This program is free software, and you are welcome to redistribute it
under certain conditions; type `,show c' for details.

Enter `,help' for help.
scheme@(guile-user)> ;; load modules, initialize mu
scheme@(guile-user)> (use-modules (mu) (mu stats))
scheme@(guile-user)> (mu:initialize)
scheme@(guile-user)>
scheme@(guile-user)> ;; count the number of messages with 'hello' in their subject
scheme@(guile-user)> (mu:count "subject:hello")
$1 = 162
scheme@(guile-user)> ;; average the size of messages with hello in their subject
scheme@(guile-user)> (mu:average mu:size "subject:hello")
$2 = 34597733/81
scheme@(guile-user)> (exact->inexact $2)
$3 = 427132.506172839
scheme@(guile-user)> ;; calculate the correlation between message size and
scheme@(guile-user)> ;; subject length
scheme@(guile-user)> (mu:correl mu:size (lambda (msg)
                        (string-length (mu:subject msg))) "subject:hello")
$5 = -0.10804368622292
scheme@(guile-user)>