Linfitxint Formulator Function - Keithley 4200A-SCS Reference Manual

Section 6: Clarius

LINFITXINT Formulator function

Finds a linear equation and returns the X intercept.
Usage
LINFITXINT(VX, VY, STARTPOS, ENDPOS)
VX
VY
STARTPOS
ENDPOS
Details
Finds a linear equation and returns the X intercept as follows:
•
Finds a linear equation of the form Y = a + bX from two sets of X and Y values selected from
two columns (vectors), VX and VY. This equation corresponds to a line drawn through two points
on a curve that is created by plotting the values in VY against the values in VX. The two points are
specified by the arguments STARTPOS and ENDPOS.
•
Returns the X intercept of the linear equation (value of -a/b in Y = a + bX).
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.
To return the X intercept of a linear regression fit for two columns (vectors), use the REGFITXINT
function.
Example
EARLYV = LINFITXINT(COLLECTORV, COLLECTORI, 56, 75)
Also see
REGFITXINT
6-252
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 6-262)
Model 4200A-SCS Parameter Analyzer Reference Manual
4200A-901-01 Rev. C / February 2017