Symbolic Math Toolbox

The findsym Command

To determine what symbolic variables are present in an expression, use the findsym command. For example, given the symbolic expressions f and g defined by

• syms a b n t x z
  f = x^n; g = sin(a*t + b); 
  

you can find the symbolic variables in f by entering

• findsym(f)
  ans = 
  n, x
  

Similarly, you can find the symbolic variables in g by entering

• findsym(g)
  ans = 
  a, b, t
  

Creating Symbolic Variables and Expressions

The subs Command