How to store multiple outputs of a structure into a character array using logical indexing.

Hello all,

Im new to Matlab and using structure, char and string arrays. Was hoping for some help on the below.

If I have a structure with different names as below, and if I have a logical array to weed out names containing FLUID, my logical array looks like log=[1;0;1;1;0]

Using the command F(log).name in the command line Yields the below output.showing all 3 names. However, if Id like to store all 3 values into a strucuture, or character/string array. Using X=F(log).name, just assings the first value 'Fluid 1'.

How could I dynamically assign all 3 values to another structure or string array?

Command Line

ans =

'Fluid1'

ans =

'Fluid2'

ans =

'Fluid3'

F(1).name='Fluid1' F(2).name='Solid1' F(3).name='Fluid2' F(4).name='Fluid3' F(5).name='Solid2'

Answer 1

[Stephen23]

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

https://www.mathworks.com/matlabcentral/answers/1656435-tutorial-comma-separated-lists-and-how-to-use-them

F(1).name='Fluid1';
F(2).name='Solid1';
F(3).name='Fluid2';
F(4).name='Fluid3';
F(5).name='Solid2';
L = logical([1;0;1;1;0]); % do NOT use LOG as a variable name

To a cell array, and then to a string array:

C = {F(L).name}

C = 1×3 cell array
    {'Fluid1'}    {'Fluid2'}    {'Fluid3'}

S = string(C)

S = 1×3 string array
    "Fluid1"    "Fluid2"    "Fluid3"

To another structure, with a different fieldname:

D = struct('X',cell(1,3));
[D.X] = F(L).name

D = 1×3 struct array with fields:
    X

D.X % check the content

ans = 'Fluid1'

ans = 'Fluid2'

ans = 'Fluid3'

[Sid Dasgupta]

Thanks Stephen! Really appreciate the help!