Modify values in a struct array

Question

DC 2020-4-1

评论： DC 2020-4-1

I would like to modify the values of a field of a struct array (without using a for loop). If my initial struct array is the following:

a.b(1).c = 5;
a.b(2).c = 5;
a.b(3).c = 5;

I would like to modify it such that:

a.b(1).c = 1
a.b(2).c = 2
a.b(3).c = 3

I thought that

[a.b.c] = [1:3]

would work, but it doesn't: Insufficient number of outputs from right hand side of equal sign to satisfy assignment.

Answer 1

Walter Roberson 2020-4-1

newvalues = 1:3;
temp = num2cell(newvalues);
[a.b.c] = temp{:};

Unfortunately this is not easy to do on one line, at least not without using a helper function.

Expand = @(temp) temp{:};
[a.b.c] = Expand(num2cell(1:3));

DC 2020-4-1

Thank you, that works!