MATLAB: How to re-save variable with only certain index values

indexing

I have a variable, mutualInfoTotal, and I would like to re-save as another variable HD_mutualInfoTotal that only contains the values of mutualInfoTotal that correspond to the following index numbers in mutualInfoTotal: [1:4, 6, 8:10, 12, 15:18, 20:22]. How can I do this?

Best Answer

HD_mutualInfoTotal = mutualInfoTotal([1:4, 6, 8:10, 12, 15:18, 20:22]);

There are a lot of ways to do indexing in MATLAB, and this is one of the most common. If you came up with those index values by using find, consider using logical indexing instead.

-Cam

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MATLAB: How to retrieve only positive values with indexing in matrix

ind = find(A>0);
B = [ind',A(ind)']
A =
     3     8
     4     7
     6    11
     7     4
     8     3
    11     6

MATLAB: Does the FIG file increase in size when I open and re-save it

FIG file size is affected by the default MAT-file format, which is set in the MATLAB preferences.

On the Home tab, go to Preferences > General > MAT-Files and make sure that the selected MAT-file format is NOT 7.3. The version 7.3 format has been known to increase the file size for complicated structures.

https://www.mathworks.com/matlabcentral/answers/409764-why-is-my-mat-file-much-larger-than-the-variable-i-was-trying-to-save-when-using-the-v7-3-flag

You should now notice that opening and re-saving the FIG file increases the file size very little (if at all).

e.g. Using MAT-file version 7 with the above script gives me the following.

>> example3
tst.fig: 111.98 KiB
tst2.fig: 112.56 KiB

Best Answer

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MATLAB: How to retrieve only positive values with indexing in matrix

MATLAB: Does the FIG file increase in size when I open and re-save it

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