WOLFRAM

WOLFRAM SYSTEM MODELER

find

Find element in a vector

Wolfram Language

In[1]:=
SystemModel["Modelica.Math.Vectors.find"]
Out[1]:=

Information

This information is part of the Modelica Standard Library maintained by the Modelica Association.

Syntax

Vectors.find(e, v);
Vectors.find(e, v, eps=0);

Description

The function call "Vectors.find(e, v)" returns the index of the first occurrence of input e in vector v. The test of equality is performed by "abs(e-v[i]) ≤ eps", where "eps" can be provided as third argument of the function. Default is "eps = 0".

Example

  Real v[3] = {1, 2, 3};
  Real e1 = 2;
  Real e2 = 3.01;
  Boolean result;
algorithm
  result := Vectors.find(e1,v);          // = 2
  result := Vectors.find(e2,v);          // = 0
  result := Vectors.find(e2,v,eps=0.1);  // = 3

See also

Vectors.isEqual

Syntax

result = find(e, v, eps)

Inputs (3)

e

Type: Real

Description: Search for e
v

Type: Real[:]

Description: Real vector
eps

Default Value: 0

Type: Real

Description: Element e is equal to a element v[i] of vector v if abs(e-v[i]) <= eps

Outputs (1)

result

Type: Integer

Description: v[result] = e (first occurrence of e); result=0, if not found