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From: Sofia Häggberg on 27 Jul 2010 10:44
a(i,b) = 1;

if a=30x3000 (all elements are zero)
b=1x30 (elements are such as: 1, 2, 3 ... ... 30)
i=1

what will happen in this case I cannot get it.

Thanks!
From: John D'Errico on 27 Jul 2010 10:51
"Sofia Häggberg" <hd.int.assNOSPAM(a)gmail.com> wrote in message <i2mrc5$ks6$1(a)fred.mathworks.com>...
> a(i,b) = 1;
>
> if a=30x3000 (all elements are zero)
> b=1x30 (elements are such as: 1, 2, 3 ... ... 30)
> i=1
>
> what will happen in this case I cannot get it.

Why not try it and see what happens?

John
From: Andy on 27 Jul 2010 10:53
"Sofia Häggberg" <hd.int.assNOSPAM(a)gmail.com> wrote in message <i2mrc5$ks6$1(a)fred.mathworks.com>...
> a(i,b) = 1;
>
> if a=30x3000 (all elements are zero)
> b=1x30 (elements are such as: 1, 2, 3 ... ... 30)
> i=1
>
> what will happen in this case I cannot get it.
>
> Thanks!

It would be far quicker to just try a small sample of code than to post and wait for a response:

a=rand(10,100); % smaller sample data
b = 1:2:10;
ix=3; % don't use i, which is ML's sqrt(-1)
a(ix,b) = 2; % outside the range of rand, so you can see clearly the changes
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