How to form a structure array variable?

I have a structure array like the below

Test{1}.a = [1; 2; 3];
Test{1}.b = [7; 3; 22];
Test{1}.c = [4; 9; 22];
...

If I have a variable (Var) that can be either a, or b, or c, ...

If Ind == 1;
    Var = 'a';
elseif Ind == 2
    Var = 'b';
elseif Ind == 3
    Var = 'c';
end

How do I specify Test{1}.Var, so that when Ind == 1, it will be Test{1}.a, and so on?

Many thanks!

Answer 1

[Cris LaPierre]

See Steven Lord's reply here. Basically, something like this:

Test{1}.a = [1; 2; 3];
Test{1}.b = [7; 3; 22];
Test{1}.c = [4; 9; 22];

Ind = 2;
if Ind == 1
    Var = {'a'};
elseif Ind == 2
    Var = {'b'};
elseif Ind == 3
    Var = {'c'};
end

Test{1}.(Var{1})

ans = 3×1

7 3 22

●

[Leon]

Exactly what I'm looking for. Many thanks!

Answer 2

[Stephen23]

Simpler using indexing:

vec = {'a','b','c'};
Test{1}.(vec{Ind})

https://www.mathworks.com/help/matlab/matlab_prog/generate-field-names-from-variables.html

[Leon]

Thanks for sharing!