How to plug in values to symbolic variables and update the matrix?

Hello,

I am not sure if this is a stupid question but I need some help with plugging in values to variables. I made some matrices with some symbolic variables.

eg:

syms lambda mu
 T = [ lambda mu 0 0 0 0;
-mu lambda 0 0 0 0;
0 0 1 0 0 0;
0 0 0 lambda mu 0;
0 0 0 -mu lambda 0;
0 0 0 0 0 1]

and this matrix T is refered in another calculation

P = transpose(T)*k*T

I want to sub in the values for lambda and mu and update values of T and P. I havent had much luck finding a solution.

Regards,

Answer 1

[VBBV]

%if true
  % code
% end
lambda = sym('20');
mu = sym('10');
T = your matrix
k = 1;
P = transpose(T)*k.*T

Answer 2

[Walter Roberson]

subs(P, [lambda, mu], [1.7, 0.4])

use appropriate values ;