On 07/25/2018 03:15 PM, shivax wrote:

> i writed GG as example.

> But i need to execute code on this array cell:

>

> GG

> [7,2] =

>

>

> here there is several null cells..

>

>

> i've try this code:

>

>>> a = cellfun (@(x) ~isempty (x) && (x ==122), string_dat_rp(:,2));

>>> find(a, 1, 'first')

>

> ans = [](0x1)

First, take a look at how Markus wrote his example: you can literally

start a fresh version of Octave and paste a copy of his code into it.

You give some results, but I had to reverse-engineer them to populate

the cell array the way I think you have it. I think I got it right, but

please try to come up with a nice compact example so that everyone can

follow and replicate it.

For instance, there's no point in using large indices like {54,2}---it

just results in large output printouts. Why not use

GG{3,2}=120

GG{5,2}=122

Next, can you give a brief background as to why you're using cell

arrays? THis is an advanced topic, and most numerical code just uses

regular arrays (eg. Gx(3,2)=6). Cell arrays are useful when your arrays

are weird, like when they contain submatrices of different size or even

dimension---this doesn't seem to be the case for you.

Then, you seem to be looking for an associative array---looking for an

index of a cell containing a specific value. Perhaps you could write

your code accordingly---maybe, if your specific values are indeed small

integers, use THEM as indices and store the coordinates : HH(120) = 54;

HH(123)=23

Then, assuming you really want to work with cell arrays, you can play

with various indexing modes: for instance observe the difference between

GG{3,2} and GG(3,2).

Octave is interactive, so you're supposed to build longer expressions by

trying their pieces on your data.

For instance, since GG(3,2) returns cells, you can do a=GG(:,2) and

then look at the result:

whos a GG

and it'll tell you that they both are cell arrays. You can then use

cellfun, and adapt the @(X) function to do what you need to do.

Again, however, it would be best if you tried to explain (with concrete,

self-contained examples) what do you want to do.