one Structure Aceess Problem

2015 6 14

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更新时间：2021 8 20

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I have these below codes:

a(1).x = [5 9];
a(2).x = [4 41];
a(3).x = [7 0];
a(4).x = [23 45];
a(2:3).x(1);

After running these codes, I encountered to below Error:

Scalar index required for this type of multi-level indexing.

Please help me to access to "a(2:3).x(1)" as [4 7].

Thanks

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Walter Roberson 2015-6-14

1 个投票

MATLAB doesn't allow that.

In the particular case that the vectors are the same size for the structure members, you can use

t = vertcat(a(2:3).x);
t(:,1)

If they are not the same size then

cellfun(@(C) C(1), {a(2:3).x})

ar fa 2015-6-15

Thanks Walter Roberson

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