From bug-request at octave dot org Thu Dec  1 14:30:35 2005
Subject: lognormal distribution defs
From: "John W. Eaton" <jwe at bevo dot che dot wisc dot edu>
To: Ben Barrowes <barrowes at alum dot mit dot edu>
Cc: bug at octave dot org
Date: Thu, 1 Dec 2005 15:29:58 -0500

On 23-Nov-2005, Ben Barrowes wrote:

| The logn***.m functions in octave are different from their counterparts in ML. Both ML:
| http://www.mathworks.com/access/helpdesk/help/toolbox/stats/lognpdf.html
| and mathworld:
| http://mathworld.wolfram.com/LogNormalDistribution.html
| define this dist not with log(mean), but with the mean itself. 

I agree that it would be best to have the lognXXX functions compatible
with Matlab, since they have the same names.

Since we already have lognormal_XXX functions that look like this:

  function XXX = lognormal_XXX (varargin)

   XXX =  lognXXX (varargin{:});

  endfunction

your patch will also affect those, and break backward compatibility
with Octave.

Can you please suggest a patch that will not break backward
compatibility?  If there is no reasonable way for the old
lognormal_XXX functions to call the new lognXXX funtions to do it,
then I think we will have to do it by copying code (but I think it
would be best to avoid the duplication if possible).

Thanks,

jwe



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