Reducing a vector size when it is being updated in a loop

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Hans123
Hans123 on 27 Mar 2019
Commented: Catalytic on 28 Mar 2019
Hi,
I have a vector A that is being updated in a loop, A contains data from a Trial, and the length of it changes with each iteration. I want to make the length of each A the same so the plots are of the same size.
Trial 1 length = 497 x 12, Trial 2 length = 700 x 12 ... Trial 5 length = 687x12 ( I want to get a 497x12 vector for all trials)
I currently have this piece of code, which find the smallest length of the A - the problem is the line of code that the smallest length out is inside the loop and after each iteration it changes.
The smallest number is a hint to how long the array A should be, since it varies for each trial uploaded.
I hope the below code helps
smallest = 10000;
for h=1:5
%code to load all script files
if h==1
A = dlmread("Trial 1");
elseif h==2
A = dlmread("Trial 2");
elseif h==3
A = dlmread("Trial 3");
elseif h==4
A= dlmread("Trial 4");
elseif h==5
A= dlmread("Trial 5");
end
[x , y] = size(A);
if x<smallest
smallest = x; %the smallest length of rows for A
end
...
end

Accepted Answer

Catalytic
Catalytic on 27 Mar 2019
Edited: Catalytic on 27 Mar 2019
for h=5:-1:1
%code to load all script files
if h==1
A = dlmread("Trial 1");
elseif h==2
A = dlmread("Trial 2");
elseif h==3
A = dlmread("Trial 3");
elseif h==4
A= dlmread("Trial 4");
elseif h==5
A= dlmread("Trial 5");
end
Acell{h}=A;
end
smallest = min( cellfun(@(c) size(c,1), Acell) );
Ashort=cellfun(@(c)c(1:smallest,:) , Acell,'uni',0);
for i=1:numel(Ashort)
figure(i); plot(Ashort{i});
end
  4 Comments
Catalytic
Catalytic on 28 Mar 2019
No, just grab whichever data set you need by indexing, as in Acell{i}.

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