Problem with solve command

syms Ax Ay Dx Dy Md F M R
syms a b c tht

% slotted arm
A = [0,0,0];  B = [a*cos(tht),a*sin(tht),0];
rAB = B-A;
FA = [Ax,Ay,0];  MA = [0,0,-M];  FR = [R*sin(tht),-R*cos(tht),0];
sumF = FA + FR
sumMA = MA + cross(rAB,FR)

sol1 = solve(sumF(1),sumF(2),sumMA(3),Ax,Ay,R)

[John D'Errico]

What is the problem? Did it give an error? If so, then report the error. Did it give a result that you think to be suspect? Why do you think so? Tell us what you think is wrong.

[Panchapakesan Venkataraman]

I apologize:

I have this error:

Error using mupadengine/feval (line 157)
MuPAD error: Error: Invalid variable to solve for. [solve]
Error in solve (line 170)
  sol = eng.feval('symobj::solvefull',eqns,vars);
Error in Ex_6_8_Frame2Dm (line 23)
sol1 = solve(sumF(1),sumF(2),sumMA(3),Ax,Ay,R)

In my previous use of solve it would return a solution in terms of the other variables, that is M and a.

I cannot find the error and I have searched on the internet. I am using ver 2014a.

Thanks

Venkat

[Sarah Palfreyman]

It seems fine in the Live Editor in R2016a. If you are having an issue please do contact Technical Support at [e-mail]

Answer 1

[Walter Roberson]

Use simplify() on the results.