Poly2Fit Formulator Function - Keithley 4200A-SCS Reference Manual

Section 6: Clarius

POLY2FIT Formulator function

Enables quadratic regression line fitting.
Usage
POLY2COEFF(VX, VY, STARTPOS, ENDPOS)
VX
VY
STARTPOS
ENDPOS
Details
Enables quadratic regression line fitting. It allows a set of data to best fit an equation of the parabola
2
Y = aX + bX + c.
The a, b, and c values of the quadratic equation are returned.
The quadratic regression line fit functions are useful for deriving the defect density when you use the
drive-level capacitance profiling (DLCP) technique.
If a VX or VY value at either STARTPOS or ENDPOS is an invalid number (that is, the value is #REF),
the function will not return a valid result.
Also see
POLY2COEFF
POLYNFIT (on page 6-259)
6-258
The name of any column (vector) listed under Columns
The name of any column (vector) listed under Columns
The row number (index) of the first set of X and Y values
The row number (index) of the second set of X and Y values
(on page 6-257)
Model 4200A-SCS Parameter Analyzer Reference Manual
4200A-901-01 Rev. C / February 2017