Keithley 4200A-SCS

Model 4200A
-SCS Parameter Analyzer Reference Manual Section 6:
Clarius
4200A-901-01 Rev. C / February 2017 6-261
REGFITSLP Formulator function
Performs a linear regression fit.
Usage
REGFITSLP(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
For the range of X and Y values to be fitted, the row number (index) of the starting
values
ENDPOS
For the range of X and Y values to be fitted, the row number (index) of the ending
values
Details
Performs a linear regression fit as follows:
• Fits the following relationship, of the form Y = a + bX, to a specified range of values in two
columns (vectors) (column VX containing X values and column VY containing Y values):
Y = REGFITYINT + REGFITSLP * X
where REGFITSLP and REGFITYINT are slope and Y-intercept constants.
• Returns the value of the slope constant REGFITSLP in the relationship above.
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.
Example
COLLECTORRES = 1/REGFITSLP(COLLECTORV, COLLECTORI, 25, LASTPOS(COLLECTORV))
Also see
REGFIT (on page 6-260)
REGFITYINT (on page 6-263)