# Create a Matrix from defined variables

1 view (last 30 days)
wissal zaher on 22 Jan 2022
Commented: wissal zaher on 22 Jan 2022
Hey guys, I'm trying to create a matrix with combined math operations from already defined variables in the workspace but I always get an error. I would really appreciate some help :)
Variables :
c1=440
c2=250
r1= 50
r2=25
Matrix :
C=[c1*r1^2, c1*r1*r2, 0;
c1*r2*r1, c2+c1*c2^2, -c2;
0, -c2, c2]
##### 2 CommentsShowHide 1 older comment
wissal zaher on 22 Jan 2022
That in order to define a function I have to use brackets but now it worked somehow.. I don't know why it was bugging

KSSV on 22 Jan 2022
c1=440 ;
c2=250 ;
r1= 50 ;
r2=25 ;
C=[c1*r1^2, c1*r1*r2, 0;
c1*r2*r1, c2+c1*c2^2, -c2;
0, -c2, c2]
C = 3×3
1100000 550000 0 550000 27500250 -250 0 -250 250
wissal zaher on 22 Jan 2022
now it worked ! I don't know why I was getting an error earlier. Thanks :)

Louis Alexander on 22 Jan 2022
this code is right.
c1=440
c1 = 440
c2=250
c2 = 250
r1= 50
r1 = 50
r2=25
r2 = 25
C=[c1*r1^2, c1*r1*r2, 0;
c1*r2*r1, c2+c1*c2^2, -c2;
0, -c2, c2]
C = 3×3
1100000 550000 0 550000 27500250 -250 0 -250 250
there could other reasons for the error.
wissal zaher on 22 Jan 2022
The error seems to be sorted out :) thanks

R2021b

### Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!