Expressing a matrix with parameters and letters

hi

in my homework it is asked to solve B*b. The solution should however contain the three variables F1, F2 and F3 that are in b.

How can I write it? They just suggest to use the "sym" command...

Answer 1

[Ajay Pattassery]

Define the variables F1, F2, and F3 as symbolic variables.

syms F1, F2, F3
B = inv(A);
b = [0 F1 0 F2 0 F3 0 0 0 ]’;
x = B*b;

Refer here for more information

[Giacomo Mastroddi]

thank you very much!!!

Answer 2

[Jesus Narvaez]

how to make a matrix that has a size of 20x20 but has parameters from -10 to 10 on both the x and y componets (horizontal and vertical)