Iterative summation using sum(), fails with ezmesh

[Erik Leunissen]

Hi all,

I want to produce a 3D-graph of a function, that in turn calls a helper 
function to perform an iterative summation.

Both functions work as expected when a single isolated call is made.

However, when they are called by ezmesh to create a graph, I get an 
error (see below).

The attached script exercises the problematic behaviour. Just do:

> octave exercise.m


Could somebody please explain why this is going wrong? Some directions 
towards a remedy would be awesome.


Thanks a lot in advance,

Erik Leunissen.
--

# ---------- the error message ----
ans = -1.0733
ans = -18.272
ans =  1.4576e-12
ans =  1.3531
error: _sumh: operator +: nonconformant arguments (op1 is 60x60, op2 is 1x9)
error: evaluating argument list element number 1
error: called from:
error:   _sumh at line 30, column 5
error: evaluating argument list element number 1
error:   C at line 26, column 5
error:   /usr/share/octave/3.6.4/m/plot/private/__ezplot__.m at line 
402, column 11
error:   /usr/share/octave/3.6.4/m/plot/ezmesh.m at line 73, column 19
error:   /home/erik/Develop/dispoctave/test/_sumh/exercise.m at line 49, 
column 1
# ---------- end of error message -----------------

exercise.m
Description: Text Data