Problems with nested indexing

Hello,

I'm using a MATLAB algorithm to project and size the components of a vehicular suspension system.

In the following lines, an error is happening:

syms a2 b2
eq3=a2*Xmse+b2-Ymse;
eq4=a2*Xes+b2-Yes;
S2=solve(eq3,eq4);
a2=S2.a2(1);
b2=S2.b2(1);

OBS: the variables Xmse, Ymse, Xes and Yes are all real numbers.

This is the error that is happening every time I run the algorithm:

" Error using sym/subsref (line 747)

SYM objects do not allow nested indexing. Assign intermediate values to variables instead.

Error in projeto_de_suspensao (line 136)

a2=S2.a2(1); "

I don't know how to fix it. Can you help me?

Thanks for the support

[Walter Roberson]

Which MATLAB release are you using? I do not get that error.

The message you are getting is what you would get if the result of the solve() were a single symbolic expression rather than a structure of results. You would get a single result if eq4 somehow ended up being a scalar symbolic variable name

[ROBSON SCHNEIDER]

MATLAB Release R2015a, Version 8.5.0.197613

Answer 1

[madhan ravi]

Remove (1) from the last two lines.

[madhan ravi]

Alternative:

[a2,b2]=solve(eq3,eq4,[a2,b2])