Save loop data

Question

Rahul 2012-3-28

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/33750-save-loop-data

评论： Mahsa Amiri 2020-7-16

I have a for loop, but every iteration overwrites the variable and I have only the final data left.. how can I save data from every loop

for mp=1:100
zsx=somecalc(mp)
end

saves only the last value when mp=100. how do I get the other values?

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Answer 1

Thomas 2012-3-28

4
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在 MATLAB Online 中打开

Thomas Anthony answered on 8 Mar 2012 at 15:06

This video should help:

http://blogs.mathworks.com/videos/2007/08/20/matlab-basics-video/

You can save the output in a vector or matrix as shown,

Eg:

for i=1:10
y(i)=i+rand;  % use y(i) so that it is written as a vector
end

or you could use:

z=[];
for i=1:10
z=[z i+rand];
end

both should give you similar results..

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Austin Hernandez 2020-4-27

在 MATLAB Online 中打开

I have a similar issue but I need to record the y-values of a line from x=a to x=b.

Each loop, the slope of the line will change so there will be a different set of x and y's for each loop

How can I record the y-values from the function for each loop? The above fix doesn't work if a function is inside of it. This is my code and gives me an error once it trys to record y(i):

function for_test
y = ones(1,1);
for i=1:10
x = 0:1:10;
y(i) = x+rand; % use y(i) so that it is written as a vector
         
end
%I want to be able to access both sets of information when the for loop is over. 
end