Array indexing nested in a struct arrray

Question

Felix 2022-9-22

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1809850-array-indexing-nested-in-a-struct-arrray

编辑： Chunru 2022-9-22

采纳的回答： Chunru

在 MATLAB Online 中打开

I am trying to directly address a value of an array in a struct array.

For example, I want the second element in each case, the output would be:

ans =

2

5

I have solved it at the moment with nested for-loops, but maybe there is a smarter solution

myTable(1).name='A';
myTable(1).data=[1:3];
myTable(2).name='A';
myTable(2).data=[4:6];
myTable(3).name='B';
myTable(3).data=[7:9];
myTable([myTable.name]=='A').data(2)        
Intermediate dot '.' indexing produced a comma-separated list with 2 values, but it must produce a single value when followed by subsequent indexing operations.

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Answer 1

Chunru 2022-9-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1809850-array-indexing-nested-in-a-struct-arrray#answer_1058470

编辑：Chunru 2022-9-22

在 MATLAB Online 中打开

myTable(1).name='A';
myTable(1).data=[1:3];
myTable(2).name='A';
myTable(2).data=[4:6];
myTable(3).name='B';
myTable(3).data=[7:9];
%myTable
a = arrayfun(@(x) x.data(2), myTable([myTable.name]=='A'))
a = 1×2
     2     5