.Modelica_LinearSystems2.Math.isEqual

Information

Syntax

result = isEqual(r1, r2);
result = isEqual(r1, r2, eps=0.0);

Description

The function call "isEqual(r1, r2)" returns true, if the two Real numbers r1 and r2 are the same up to a given precision eps. (result = abs(r1-r2) ≤ eps). Otherwise the function returns false. With the optional third argument eps the range can be defined, in which two Real numbers are treated as identical. The default is "eps = 0". Another useful value is, e.g., "eps = 10*Modelica.Constants.eps".

Example

  Real r1 = 3;
  Real r2 = 3;
  Real r3 = 3.0001;
  Boolean result;
algorithm
  result := isEqual(r1,r2);          // = true
  result := isEqual(r1,r3);          // = false
  result := isEqual(r1,r3, eps=0.1); // = true

See also

Modelica.Math.Vectors.isEqual, Modelica.Math.Matrices.isEqual, Modelica.Utilities.Strings.isEqual

Interface

function isEqual
  extends Modelica.Icons.Function;
  input Real u1 "First scalar";
  input Real u2 "Second scalar";
  input Real eps(min = 0) = 0.0 "The two scalars are identical if abs(u1-u2) <= eps";
  output Boolean result "True, if abs(u1-u2) <= eps";
end isEqual;