How to stop MatLab from automatically substituting in variables?

Hello everyone,

I am wondering how I can get Matlab to not automatically substitute in for the variables in the expressions that follow. For instance, if I wrote this code

syms R w rho
volume = pi * R^2 * w 
m= rho * volume
I = (1/2)*m*R^2 + m*e^2

Matlab gives me the following outputs:

volume = pi * R^2 * w

m = pi * R^2 * w * rho

I = (rho * w *pi * R^4)/2 + etcetera

What I want is to have the outputs in terms of the variables that came before them, instead of substituting for the base variables.

So for m I would want it to visually display m = rho * volume, instead of plugging in all the individual variables from the volume equation.

Thank you,

Answer 1

[Sai Sri Pathuri]

To have the output in terms of volume, you may declare volume as a symbolic variable and define it after defining m.

syms R w rho volume 
m = rho * volume 
volume = pi * R^2 * w