Index exceeds number of array elements/Issue with Symbolic Variable

A = [0 1;-2 -0.2];

[T,Gamma] = eig(A);

syms t

e_Tinv_A_T = [exp(Gamma(1,1)*t) 0 ; ...

0 exp(Gamma(2,2)*t)];

I get the following error message when attempting to find e_Tinv_A_T:

An unexpected error has occurred:

Index exceeds the number of array elements. Index must not exceed 4.

I'm not entirely sure why I am unable to multiply the "gamma" values above by the symbolic variable t. Are they not the same dimension?

Answer 1

[KSSV]

A = [0 1;-2 -0.2];
[T,Gamma] = eig(A);
syms t
e_Tinv_A_T = [exp(Gamma(1,1)*t)        0    ; ...
                    0       exp(Gamma(2,2)*t)]

e_Tinv_A_T = 

It shows no error. Clar all your variables and try running the code.