How to parameterize function.

hi, i created a vector form like given below and i want to replace x y z with t variable like this. P = [t^2 +2*t +3*t; t*t -2*t^2] . but this is a case where x = y = z =t. how can i replace x y and z with t .

syms x y z

P = [x^2 +2*y +3*z; x*y -2*z^2]

Answer 1

[Star Strider]

Try something like this —

syms t x y z 
P{1} = x^2 +2*y +3*z; 
P{2} = x*y -2*z^2;
P = subs(P,{x,y,z},{t,t,t})

P = 

See the documentation on subs for details.

Another option is to create it as a symfun, then choose the arguments to assign to ‘t’.

.

[abdulsamed kaymakci]

thanks sir.

[Star Strider]

As always, my pleasure!

Also, to get them as a column vector —

syms t x y z 
P{1,:} = x^2 +2*y +3*z; 
P{2,:} = x*y -2*z^2;
P = subs(P,{x,y,z},{t,t,t})

P = 

.

Answer 2

[VBBV]

syms x y z
 P = [x^2 +2*y +3*z; x*y -2*z^2]
 subs(P,{x,y,z},{t,t,t})

[abdulsamed kaymakci]

thanks sir.