sym function help

Hi,

I'm trying to write a short script file to quickly calculate some values.

My question is about using the the sym function. I have the code

 w = sym('w');

to denote that i want w to be understood as a symbol.

the problem is that the returned value is in a very hard to understand form. I know my equation is correct so that is not the problem. For example, matlab will return

Zc =

((944473296573929*w*(3/2000 - (295147905179352825856*i)/(681791660964305*w) + (1702413117074507*w*i)/2361183241434822606848)*i)/1180591620717411303424 + (819854011140975/1152921504606846976 + (6876370061968011*w*i)/9671406556917033397649408)*(3/2000 - (295147905179352825856*i)/(681791660964305*w) + (1702413117074507*w*i)/2361183241434822606848) + (944473296573929*w*(819854011140975/1152921504606846976 + (6876370061968011*w*i)/9671406556917033397649408)*i)/1180591620717411303424)/(3/2000 - (295147905179352825856*i)/(681791660964305*w) + (1702413117074507*w*i)/2361183241434822606848)

Is there a way for matlab to simplify this further? i.e., why doesn't matlab simplify some of the divisions?

Thanks for any input.

Answer 1

[Sean de Wolski]

double(Zc)

or

simplify(Zc)

or

subs(Zc,w,value)

or

simple(ZC)

just throwing a few things out there for you.

Answer 2

[Walter Roberson]

MuPad only automatically simplifies divisions involving numeric constant values. Apply simplify() to get a more compact expression.