Accessing Elements in Arrays
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I have an array like this:
s.x
ans = 4000
280
ans = 4272.5
282
ans = 4553.85
284.29
etc......
I would like to access the first element in each case to plot their values (4000 4272.5 4553.85).
s(1,1).x([1]) yields 4000
s(1,2).x([1]) yields 4272.5
s(1, 1:2).x([1]) gives error: a cs-list cannot be further indexed.
What is the proper syntax needed to yield an array containing the values 4000 4272.5 and 4553.85 please?
回答（1 个）
Ameer Hamza
2020-12-2
编辑：Ameer Hamza
2020-12-2
You can use arrayfun()
v = arrayfun(@(s_) s_.x(1), s)
Indexing of struct arrays and cell arrays can be a bit confusing in MATLAB. Check the following links
Following is another solution
v = [s.x];
v = v(1,:);
4 个评论
Chris Stillo
2020-12-2
Ameer Hamza
2020-12-2
I am glad to be of help! :)
In short, arrayfun is just a for-loop. Following two codes are same
v = arrayfun(@(s_) s_.x(1), s)
or
v = zeros(size(s));
for i = 1:numel(v)
v(i) = s(i).x(1);
end
Chris Stillo
2020-12-2
Ameer Hamza
2020-12-2
I am glad to be of help!
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2020-12-2
2020-12-2
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