# Simple Matrix Looping Problem

1 view (last 30 days)
B_Richardson on 18 Jul 2011
Hello everyone,
I have a matrix:
B = zeros(10, 2);
B =
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
I want to fill the matrix with values in order:
%step 1 value = 15.654
B =
15.654 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
%step 2 value = 16.378
B =
15.654 16.378
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
%step 3 value = 17.478
B =
15.654 16.378
17.478 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
and so on until the matrix is full. Value is updated in a pushbutton callback. I know obviously that I have to loop through the matrix i'm just not sure of the exact syntax necessarily to step through each element in that order.

bym on 18 Jul 2011
you can transpose B and then loop through and fill in values then transpose back
B = zeros(2,10)
for k = 1:20
%update value here
end
B = B.'
##### 2 CommentsShow NoneHide None
B_Richardson on 18 Jul 2011
what does the last line do?
B = B.'
And I'm not familiar with the term "transpose?"
Fangjun Jiang on 18 Jul 2011
try this to understand it.
a=1:3
b=a'
or b=a.'

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