Hi!
Using Octave 3.0.0 in Ubuntu 8.04, with the statistics-1.0.7 package
I'm having problems with the mad function.
octave:6> a=randn (1,30);
octave:7> mad(a);
usage: a = mad (X,dim)
error: evaluating if command near line 23, column 3
error: called from `mad' in file `/home/tulku/octave/statistics-1.0.7/mad.m'
I got the same error with all these commands:
octave:7> mad(a');
octave:7> mad(a,1);
octave:7> mad(a,2);
Interesting, the help mad output is:
octave:7> help mad
a = mad(X)
mean absolute deviation of X
and it does not mention the "dim" argument.
Looking at the source code of the mad function I changed the offending
if, and seems to fix the problem. It is a very small change, showed in
the following diff:
--- mad.m 2008-10-15 12:53:57.000000000 -0300
+++ new-mad.m 2008-10-15 12:54:17.000000000 -0300
@@ -20,7 +20,7 @@
dim = min(find(size(X)>1));
if isempty(dim), dim=1; endif
endif
- if (nargin != 1 || nargin != 2)
+ if (nargin != 1 && nargin != 2)
usage("a = mad (X,dim)");
elseif (prod(size(X)) != size(X,dim))
% if (prod(size(X)) != size(X,dim))
The help string should also be fixed to include the dim argument.
Thank you very much!
Lucas Chiesa
"Oh no, not again."
- A bowl of petunias on it's way to certain death.
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