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From: roya olyazadeh on 17 May 2010 13:49
I have matrix like this :

Q =
1 2 3
4 5 6

Now I want to add some zero cells to this matrix like this

for i = 1 : length(stn) % number of station
if fix1(i)==1 % If station is fixed

????? % Add row i and column i that all = 0

end
end
for example i=1
Q=
0 0 0 0
0 1 2 3
0 4 5 6
From: Nathan on 17 May 2010 13:57
On May 17, 10:49 am, "roya olyazadeh" <roya2...(a)gmail.com> wrote:
> I have matrix like this :
>
> Q =
>      1     2     3
>      4     5     6
>
> Now I want to add some zero cells to this matrix like this
>
> for  i = 1 :  length(stn)   % number of station
>     if fix1(i)==1    % If station is fixed
>
>            ?????  % Add  row i and column i that all = 0  
>
>     end
> end
> for example i=1
> Q=
>     0  0     0    0
>     0  1     2     3
>     0  4     5     6

Better yet, we don't need a for loop:

Q = [zeros(1,size(Q,2)+1);zeros(size(Q,1),1) Q]

Works for any arbitrary matrix Q where you want to pad the top and the
left with zeros.

-Nathan
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