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TMtxExpression.DefineFunction Method ([In] string, TExprFunc, int, int, [In] string)
TMtxExpression Class  TMtxExpression Members  Dew.Math Namespace  DefineFunction Method  Example  See Also
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Defines new function.

Syntax
C#
Visual Basic
public int DefineFunction([In] string AFunctName, TExprFunc AFuncAddress, int NArguments, int NResults, [In] string Help);
Parameters
Parameters 
Description 
[In] string AFunctName 
Defines function name. If a function with the same name was already definded, it is redefined and all expressions which contain the symbol AFuncName will be recompiled before the next evaluation. 
TExprFunc AFuncAddress 
 
int NArguments 
Defines number of arguments for function. 
int NResults 
Defines number of arguments, which are treated as results. NResults <= NArguments 
[In] string Help 
Function help text. 
See Also
Example

Add factorial function to the function list.

using Dew.Math; using Dew.Math.Units; namespace Dew.Examples() { void Example() { void _Factorial_D (TExprRec Param) { Param.Res.DefineDouble; Param.Res.DoubleValue = Fact(System.Math.Round(Param.Args[0].DoubleValue)); } void Example(TMtxExpression MyParser); { myParser.DefineFunction("fact_double", _Factorial_D, 1, "fact_double(x): factorial function"); } } }
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