Help with for loop for a function

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Andrea
Andrea 2014-11-23
回答： Andrea 2014-11-23
I am trying to run the following for loop for different values of t from 0.01 to about 10 however I keep on getting Attempted to access M(0.1); index must be a positive integer or logical. Error in untitled3 (line 3)
When i change t to be a integer the for loop runs perfectly fine and saves the output into a vector M. I also tried using the cell command but it didn't work. Any help would be appreciated. The function does take any number, it doesn't have to be an integer. When I run the function for specific values it does work.
M=[];
for t=0.01:0.01:10;
M(t)=dtmf_attack(t);
end
display(M)

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回答（3 个）

Orion
Orion 2014-11-23
编辑：Orion 2014-11-23
just add a counter
M=[];
i=0;
for t=0.01:0.01:10;
i=i+1;
M(i)=dtmf_attack(t);
end
display(M)
Image Analyst
Image Analyst 2014-11-23
编辑：Image Analyst 2014-11-23
Try this:
% Define t
t=0.01:0.01:10;
% Build M:
M = zeros(1, length(t)); % Optional preallocation.
for k = 1 : length(t)
M(k) = dtmf_attack(t(k));
end
% Display M
M
Andrea
Andrea 2014-11-23
Thanks they both worked

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