how to form the code for fixed value and variable value

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Prabha Kumaresan
Prabha Kumaresan 2017-11-30
评论： per isakson 2017-11-30
the code which i need help:
i=1:10;
j=1:20,1:40,1:60,1:80,1:100,1:120;
G(i,j);
Code:
siz = size(G);
idx = sub2ind(siz, randi([1,10], 1, siz(2)), 1:siz(2));
C = zeros(siz);
C(idx) = G(idx);
in the above code the value of i=1:10,j=1:20. how to modify the code such that when the code runs second time i=1:10 and j=1:40,when the code runs for the next time i=1:10 and j=1:60 and it goes on.
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回答（1 个）

Walter Roberson
Walter Roberson 2017-11-30
persistent number_times_run
if isempty(number_times_run); number_times_run = 0; end
number_times_run = number_times_run + 1;
i = 1:10;
j = 1 : 20 * number_times_run;

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