MATLAB: How to exract data from a figure and insert x and y values into a .mat file

.mat filedataextracting datafigure

Hello everyone, i have a discrete plot figure , which shows the generated packet size over time , i want to see the x and y values in .mat file i use that

x = get(gco,'xdata')
y = get(gco,'ydata')
now i have the x and y values(200 per each), but i wanna have a .mat file 200x2 that shows x and and its corresponding y in the same row, Can anyone help please? Thank you so much in advance!

Best Answer

z = [x(:), y(:)];
save('MatFileName', 'z')

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MATLAB: .mat file

You can use MAT-file interface library to read & write MAT files from standalone C or Fortran code.

See Custom Applications to Read and Write MAT-Files

MATLAB: How to exract varying matrix data

 p(y(i),:)= X(1:y(i),:)

Is trying to put a y(i) by "n" matrix into a 1 by "n" matrix, which CANNOT work.

 p(y(i),:)= X(y(i),:)

Is trying to put a 1 by "n" matrix into a 1 by "n" matrix, which can work, provided that "y" has enough elements.

If you define y to be a list of the ROWS you want (this is the way round you've got your code, swap the :, and y(i) round for columns):

 p = zeros(size(X)); % or ones, or NaNs, or whatever else as needed.
 y = [1 5 7 8 9 350];
 for i = 1:numel(y)
  p(y(i),:) = X(y(i),:);
 end

Best Answer

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MATLAB: .mat file

MATLAB: How to exract varying matrix data

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