From mboxrd@z Thu Jan  1 00:00:00 1970
From: Thierry Banel <tbanelwebmin@free.fr>
Subject: Re: table formula help...
Date: Tue, 09 Dec 2014 23:35:40 +0100
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Ok, done.
A clean design has been implemented for handling empty cells.

Basically, empty input cells are ignored, and therefore they do not
participate in the aggregation. (However, for aggregation using two
columns (=corr(p,q)= for example), if a pair of cells contains both an
empty and a non-empty cell, then the empty one is replaced by zero.)

On output, empty cells are generated when the aggregation function does
not have enough input. For instance, =mean= needs at least one value,
otherwise a division by zero happens.

Thanks to Michael Brand for his insight and suggestions.

Source code and documentation here:
  https://github.com/tbanel/orgaggregate

Melpa installation:
  (require 'package)
  (add-to-list 'package-archives
    '("melpa" . "http://melpa.milkbox.net/packages")
    t)
  (package-initialize)
  M-x package-list-packages
  install orgtbl-aggregate

Have fun
Thierry