Method on @sym: isnan (x) ¶

Return true if a symbolic expression is Not-a-Number.

Example:

A = [sym(1) sym(0)/0 sym(1)/0; sym(nan) 1 2]
  ⇒ A = (sym 2×3 matrix)
      ⎡ 1   nan  zoo⎤
      ⎢             ⎥
      ⎣nan   1    2 ⎦
isnan(A)
  ⇒ ans =
      0   1   0
      1   0   0

Note that the return is of type logical.

See also: @sym/isinf, @sym/double.

Package: symbolic