Determine symbolic variables in expression


symvar 'expr'
s = symvar('expr')


symvar 'expr' searches the expression, expr, for identifiers other than i, j, pi, inf, nan, eps, and common functions. symvar displays those variables that it finds or, if no such variable exists, displays an empty cell array, {}.

s = symvar('expr') returns the variables in a cell array of strings, s. If no such variable exists, s is an empty cell array.


symvar finds variables beta1 and x, but skips pi and the cos function.

symvar 'cos(pi*x - beta1)'

ans = 


See Also

Was this topic helpful?