# I want find mean of out.txt file such that this file is replaces at every iteration and hence values changed.

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Adeline War on 22 Nov 2022
Commented: Mathieu NOE on 22 Nov 2022
Hello everyone.
How are you?
I have a question here. With every iteration I have an output.txt file generated such that values vary with each iteration. Now I want to find the mean of each iteration till 100 iterations and store the mean in some variable ( say m1 to m100) or if there is any other representation in a txt or excel file also. Please help me how to code it such that my mean is calculated based on the present file generated.
I have attached here two output files (out) for two iterations but this can go to 100. You can try with 5 such different output files.
Thank you,
Adeline
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Mathieu NOE on 22 Nov 2022
I am not sure to understand ...

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### Answers (1)

Voss on 22 Nov 2022
Let's say you have 100 iterations, and data is a vector containing the numbers written to file on each iteration. Then to calculate the mean of data on each iteration and store those means, you could say:
n_iterations = 100;
% initialize a vector to store the means:
data_means = zeros(1,n_iterations);
for ii = 1:n_iterations
% ...
% whatever code calculates 'data'
% ...
% store the mean of the current 'data' in element ii of 'data_means':
data_means(ii) = mean(data);
end
Or, if you don't know how many iterations there will be:
% initialize a vector to store the means:
data_means = [];
while true % some condition that will eventually be false
% ...
% whatever code calculates 'data'
% ...
% store the mean of the current 'data' in a new element of 'data_means':
data_means(end+1) = mean(data);
end
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