Matlab: How to merge the values of struct array fields

Question

Is it possible to easily combine values from struct array fields into a single array without looping through each individual struct in the array?

For reference, see the attached code:

% build random struct array with only one field
% for demonstration only
clear i s out;
for i = 1:10
    s(i).value = rand;
end
s

% not working, as it returns multiple results
s(1:end).value

% combine all "value" into a single array using for-loop
out = zeros(length(s), 1);
for i = 1:length(s)
    out(i) = s(i).value;
end
out

Simply put, the goal is to kind of "merge" all "value" fields.

Jørgen · Accepted Answer · 2016-01-08 14:17:23Z

2

You can get it using the following:

out = [s.value]

The s.value returns all the values and [...] to make an array of them.

edited Jan 8, 2016 at 14:17

answered Jan 8, 2016 at 11:43

Jørgen

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1 Comment

Alexander Over a year ago

I was absolutely sure that I did try this, but obviously I was wrong. Thanks! For completeness: The (:) is not needed, only the [...]

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