Retrieve a vector from a field of a structure with certain length

Hi everyone!

I would like to retrieve a vector from a field of a structure with certain length and I would like to avoid loops. That is. I have the following structure:

Problem.phases(1).path.nonLinear(1).buffer.include = 1;

Problem.phases(1).path.nonLinear(2).buffer.include = 0;

And I would like to retrieve an array for the different nonLinear include fields as

Array = [1;0]

So far, I have been trying with the following command:

Problem.phases(1).path.nonLinear.buffer.include

But it gives the following Error:

Expected one output from a curly brace or dot indexing expression, but there were 2 results.

Anyone knows how this could be solved?

Regards,

Guillermo

Answer 1

[Stephen23]

>> Problem.phases(1).path.nonLinear(1).buffer.include = 1;
>> Problem.phases(1).path.nonLinear(2).buffer.include = 0;

Method one: temporary variable:

>> tmp = [Problem.phases(1).path.nonLinear.buffer];
>> mat = [tmp.include]
mat =
   1   0

Method two: arrayfun:

>> fun = @(s)s.buffer.include;
>> mat = arrayfun(fun,Problem.phases(1).path.nonLinear)
mat =
   1   0

See also:

https://www.mathworks.com/help/matlab/matlab_prog/comma-separated-lists.html

https://www.mathworks.com/matlabcentral/answers/320713-how-to-operate-on-comma-separated-lists

https://www.mathworks.com/matlabcentral/answers/344486-generate-comma-separated-list-in-single-line-of-code