Using subs function on a syms matrix

Question

iamShreyans 2019-9-24

评论： Star Strider 2019-9-24

I have a matrix 't' which initially has sysm variables as input

t = [t1 t2 t3]; %t1 t2 and t3 are syms variables

Later, I wish to substitute constant values in place of the syms variables in the matrix 't'. For this, I tried running the following code:

subs(t,[t1 t2 t3],[0 0 45])

But when I print the 't' matrix in command window, I get the output:

t = [t1, t2, t3]

So, it seems that the syms variables are not being replaced with the desired constant values. How do I tackle this problem?

Answer 1

Star Strider 2019-9-24

Assign it to ‘t’:

syms t1 t2 t3 
t = [t1 t2 t3]; %t1 t2 and t3 are syms variables
t = subs(t,[t1 t2 t3],[0 0 45])

producing:

t =
[ 0, 0, 45]

iamShreyans 2019-9-24

Great! Thanks a lot!

Star Strider 2019-9-24

As always, my pleasure!