separate matrices out of struct

I have a struct having matrices of B1, B2, and B3. I want to make three separate matrices out of them available in the Workspace automatically with the help of a loop. How?

S = struct('B1',[1 2;3 4],'B2', [5 6; 7 8], 'B3', [9 10; 11 12] )

[Stephen23]

"I want to make three separate matrices out of them available in the Workspace automatically with the help of a loop"

Here is why that would be a very bad idea:

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

Answer 1

[Jos (10584)]

Why? Apparently the three matrices are related. Keeping them in a single struct shows this relationship. If you need to access one of them you can easily do this using assignment operations

X = S.B1

or dynamically

k = 2
field = sprintf('B%d',k) 
X = S.(field)

Answer 2

[Rightia Rollmann]

Thanks, man! You not just answered it, but perfected the question too!