MATLAB Struct Access

Question

A MATLAB struct was created:

filenameSubstring='C:\Data\**/*.json';
filenames = dir(filenameSubstring);

The attempt to evaluate the mean was unsuccessful:

sizemean = mean(filenames.size);

Attempts to create an array was not successful in that it returned only one value:

test=(filenames(:).bytes)

I could put the access the each element using a for loop:

for i= 1:size(filenames,1)
    test(i)=filenames(i).bytes;
end

Is there a concise one-liner that can move all .bytes elements into an array for further evaluation?

Cris Luengo · Accepted Answer · 2018-06-23 07:12:41Z

5

Yes:

[filenames.bytes]

filename.bytes generates a comma-separated list of values, equivalent to filename(1).byes, filename(2).bytes, filename(3).bytes, .... The square brackets concatenate these into an array. The above is thus the same as

[filename(1).byes, filename(2).bytes, filename(3).bytes, ... ]

answered Jun 23, 2018 at 7:12

Cris Luengo

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