TMtxVecIntHelper.FindIndexes Method (TMtxVec, string, TCplx)

Fills the calling vector with indexes, where the logical expression is true.

Pascal

function FindIndexes(const a: TMtxVec; const op: string; const b: TCplx): TMtxVecInt; overload;

Description

Fills the calling vector with indexes, where the Op comparison between a and b is True. Op string parameter can be '<', '>', '>=','<=','=' or '<>'. The calling vector will be sized to match a.Length. On return it will be subranged to reflect actual number of matching elements. The method will not raise an exception, if the calling vector (Self) is already subranged. Check the TVec.SetSubRange routine to learn more about subranges.

Example

Ensure that the power function will return 0, if the exponent is 0.

CreateIt(a,b); With TVec(Self) do try Ln(Base); //First do it the normal way then fix the anomalies Mul(Exponent); Exp; a.FindIndexes(Exponent,'=',0); b.Size(a.Length,Complex); b.Setval(1); Scatter(b,a); finally FreeIt(a,b); end;

TMtxVecIntHelper Class Helper, TMtxVecIntHelper Members, MtxVec Namespace, FindIndexes Method, Example, See Also

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