Difference between revisions of "StepInterp"

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  StepInterp( D,A,X,I)
 
  StepInterp( D,A,X,I)
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= Notes =
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StepInterp uses a "left-step" -- the step up takes place at the left side of each interval.  Sometimes you might want a "right-step", using the previous value smaller than or equal to X, rather than the next value greater than or equal to X.  One implementation of this other variant is a [[User-Defined Functions|UDF]]:
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Function RStepInterp(D:ascending[I] ; R:Array[I] ; X ; I : Index )
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Definition:
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    Var pos := StepInterp(D,@I,X,I);
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    R[@I= if X=D[@I=pos] then pos else max([1,pos-1]) ]
  
 
= See Also =
 
= See Also =

Revision as of 20:25, 5 October 2007


(stub)

Declaration

StepInterp( D,A,X,I)

Notes

StepInterp uses a "left-step" -- the step up takes place at the left side of each interval. Sometimes you might want a "right-step", using the previous value smaller than or equal to X, rather than the next value greater than or equal to X. One implementation of this other variant is a UDF: 

Function RStepInterp(D:ascending[I] ; R:Array[I] ; X ; I : Index )
Definition: 
   Var pos := StepInterp(D,@I,X,I);
   R[@I= if X=D[@I=pos] then pos else max([1,pos-1]) ]

See Also

Comments


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