MATLAB debug

1、函数返回值为矩阵时无法索引

subindex = @(A, r, c) A(r, c); 
g_A_B = @(t) g(1)*subindex(f11(t),1,1)+g(2)*subindex(f11(t),2,1)+g(3)*subindex(f11(t),3,1)+g(4)*subindex(f11(t),4,1)