please help me with this

hi i have a problem with solve:

syms t1 t2 t3 t4 t5 t6 
eqns = (-0.7591*t1+0.3789*t2 == -38.689,0.3789*t1-0.7591*t2+0.3789*t3 == -0.799 , 0.3789*t2-0.7591*t3+0.3789*t4 ==-0.799,0.3789*t3-0.7591*t4+0.3789*t5 == -0.799,0.3789*t4-0.7591*t5+0.3789*t6 == -0.799,0.3789*t5-0.3802*t6 == -0.0412 );
S = solve(eqns,[t1 t2 t3 t4 t5 t6])

but it give me this error:

Invalid expression. When calling a function or indexing a variable, use parentheses.

Otherwise, check for mismatched delimiters.

what can i do to solve it?

Answer 1

[Ameer Hamza]

Use square brackets instead of parenthesis in the definition of eqns

syms t1 t2 t3 t4 t5 t6 
eqns = [-0.7591*t1+0.3789*t2 == -38.689, 0.3789*t1-0.7591*t2+0.3789*t3 == -0.799 , 0.3789*t2-0.7591*t3+0.3789*t4 ==-0.799,0.3789*t3-0.7591*t4+0.3789*t5 == -0.799,0.3789*t4-0.7591*t5+0.3789*t6 == -0.799,0.3789*t5-0.3802*t6 == -0.0412 ];
      %^ use this
S = solve(eqns,[t1 t2 t3 t4 t5 t6])

[arsalan mehrabi]

thanks man but what was the problem?

[Ameer Hamza]

The parenthesis is not used to create vectors in MATLAB. They are used for indexing or passing arguments to a function. Square brackets are used to create vectors.

[arsalan mehrabi]

thank you man

[Ameer Hamza]

I am glad to be of help!