findsym - Maple Help
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MTM

 findsym
 find symbols

 Calling Sequence findsym(M) findsym(M,n)

Parameters

 M - array or expression n - integer

Description

 • The findsym(M) function finds symbolic variables in M. The sequence of symbols are returned in alphabetical order.
 • The findsym(M,n) function finds the n symbolic variables in an expression nearest in alphabetical order to the letter x.
 • Symbolic constants like the imaginary unit and Pi are not considered variables, so they will not be returned from a call to findsym even when present in the given expression.

Examples

 > $\mathrm{with}\left(\mathrm{MTM}\right):$
 > $M≔\mathrm{Matrix}\left(2,3,'\mathrm{fill}'=a\left(x+y\right)\right):$
 > $\mathrm{findsym}\left(M\right)$
 $\left[\begin{array}{ccc}{a}& {x}& {y}\end{array}\right]$ (1)
 > $\mathrm{findsym}\left(\mathrm{α}+a+b\right)$
 $\left[\begin{array}{ccc}{a}& {\mathrm{\alpha }}& {b}\end{array}\right]$ (2)
 > $\mathrm{findsym}\left(\mathrm{cos}\left(\mathrm{α}\right)b\mathrm{x1}+14y,2\right)$
 $\left[\begin{array}{cc}{\mathrm{x1}}& {y}\end{array}\right]$ (3)
 > $\mathrm{findsym}\left(y\left(4+3I\right)+6\right)$
 ${y}$ (4)