Try to use solve but getting "Error in MuPAD command: Index exceeds matrix dimensions"
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Hello,
I get the following error message when I try to use solve using a system of equations and specifying the variables to be solved for:
Error in MuPAD command: Index exceeds matrix dimensions.
Essentially, I have 7 equations with 3 variables (a, lambda1 and lambda2) and one parameter (2). Below is my source code. I am using the Student version of MATLAB R2010a.
syms a s lambda1 lambda2;
S = solve('lambda1 - lambda2 + 1=0','a>=0', 's/2 - a >= 0', 'a*lambda1=0','lambda2*(s/2 - a)=0','lambda1>=0','lambda2>=0','a','lambda1','lambda2');
Please note that when I take away either the 'a', 'lambda1', or the 'lambda2' (i.e. so that I am just solving for 2 variables instead of 3), then the error message goes away. But when I try to solve for all 3 variables 'a', 'lambda1' and 'lambda2', then I get the error message.
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Walter Roberson
2017-7-9
This appears to be the same bug as https://www.mathworks.com/support/bugreports/677110 except no trig is involved.
Workaround:
Call the MuPAD symbolic engine directly. For example,
>> S = evalin(symengine,'solve([p1-y1,p2-y2,p3-sin(y3)],[y1,y2,y3])')
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