Symbolic Math Toolbox

double

Convert symbolic matrix to MATLAB numeric form

Syntax

• R = double(S)
  

Description

double(S) converts the symbolic object S to a numeric object. If S is a symbolic constant or constant expression, double returns a double-precision floating-point number representing the value of S. If S is a symbolic matrix whose entries are constants or constant expressions, double returns a matrix of double precision floating-point numbers representing the values of S's entries.

Examples

double(sym('(1+sqrt(5))/2')) returns 1.6180.

The following statements

• a = sym(2*sqrt(2));
  b = sym((1-sqrt(3))^2);
  T = [a, b]
  double(T)
  

return

• ans =
      2.8284    0.5359
  

See Also

sym, vpa

digits

dsolve