Separate cell array and perform Gaussian fit

Hey everyone,

Please forgive me in advance if this is a trivial problem. I am not a matlab expert.

I have a set of data that is 36180x3. Every 180 rows, I need to fit a gaussian distribution to the data and record the c-parameter from the fit (x data is 2nd column, y data is 3rd column).

I am struggling to put together an i loop that would achieve this. Can someone help me with this?

Answer 1

[Star Strider]

No problem is ‘trivial’, but some are easier than others!

I would use the reshape function:

M = randn(360, 3);                                  % Create Data Matrix
Mr = reshape(M, [], fix(size(M,1)/180), 3);         % Reshape

Q1 = M(1:5,:);                                      % Check Original (Delete)
Q2 = squeeze(Mr(1:5,1,:));                          % Check Results (Delete)

for k1 = 1:size(Mr,2)
    prms{k1} = polyfit(Mr(:,k1,2), Mr(:,k1,3), 5);  % Fit Data
end

I used polyfit here only to illustrate the procedure. I did not attempt to do a Gauss function fit.

[Nathan]

Thank you for the answer! After some manipulation, I was able to get it to work for my script.

Thanks again!

[Star Strider]

My pleasure!

If my Answer helped you solve your problem, please Accept it.