Keithley 4200A-SCS Reference Manual

Model 4200A
-SCS Parameter Analyzer Reference Manual Section 6:
Clarius
4200A-901-01 Rev. C / February 2017 6-257
POLY2COEFF Formulator function
Enables quadratic regression line fitting.
Usage
POLY2COEFF(VX, VY, STARTPOS, ENDPOS)
VX
The name of any column (vector) listed under Columns
VY
The name of any column (vector) listed under Columns
STARTPOS
The row number (index) of the first set of X and Y values
ENDPOS
The row number (index) of the second set of X and Y values
Details
Enables quadratic regression line fitting. It allows a set of data to best fit an equation of the parabola
Y = aX
2
+ 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
POLY2FIT (on page 6-258)
POLYNFIT (on page 6-259)

Keithley 4200A-SCS Specifications

General

Brand	Keithley
Model	4200A-SCS
Category	Measuring Instruments
Language	English