bug compatibility ;-)

[Daniel Heiserer]

Hi,
I have a request for another bug compatibility of matlab. (if you want
to see it like this)

octave:1> a=rand(4)
a =

   9.0658e-05   9.8327e-01   7.0094e-01   2.4211e-01
   6.4865e-01   7.2977e-01   3.5448e-01   6.4133e-01
   4.1370e-01   5.2723e-01   4.1625e-01   7.1674e-01
   7.9464e-01   9.0385e-02   3.8075e-01   4.3088e-01

octave:2>
octave:2> a(:)
error: single index only valid for row or column vector
error: evaluating index expression near line 2, column 1

The thing is that I want to filter some data in a matrix using find
and reassign new values than. Unfortunately I don't know how to do 
that in octave.

example:
a=rand(4,4);
b=find(a<0.3);
c=find(a>0.7);
a(b)=0;
a(c)=1;

In matlab that kind of stuff works, because matlab allows 
single-indexing of multiindexed variables. 
assignments like a=rand(4);b=a(:); work.
Maybe there is a "cleaner" way, but matlab's 'quick and dirty'
approach works quite fine.

Thanks daniel