How do you extract a submatrix from a matrix in matlab?

In MATLAB, you can extract a submatrix by specifying the row and column indices of the desired elements. For example, if A is your matrix, you can extract a submatrix by using the syntax B = A(row_indices, column_indices), where row_indices and column_indices are vectors specifying the rows and columns you want to include. Alternatively, you can use a range, such as B = A(1:3, 2:4) to extract rows 1 to 3 and columns 2 to 4.