how to get element of a matrix that defined as a function?

hi. suppose this matrix function. how can i get its elements ? for example ha(1,1) dosent work.

ha=@(J) [0 J;1 J];

[Stephen23]

See also earlier question:

https://www.mathworks.com/matlabcentral/answers/496713-how-to-conver-a-string-to-a-array-or-matrix

Answer 1

[Stephen23]

That numeric matrix is only created when the function is called, it does not exist beforehand.

So you need to call the function, assign its output to a variable, and then use indexing:

M = ha(5)
M(1,1)