Model 4200A-SCS Parameter Analyzer Reference Manual
Section 6: Clarius
4200A-901-01 Rev. C / February 2017
6-249
EXPFITB Formulator function
Performs an exponential fit. Fits the following exponential relationship to a specified range of values in two
columns (vectors): one column, VX, containing X values and the other column, VY, containing Y values:
Y = EXPFITA * e
(EXPFITB * X)
Where
EXPFITA
and
EXPFITB
are fit constants.
Returns the value of the constant
EXPFITB
in the relationship above.
Usage
EXPFIT(
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 exponentially fitted, the row number (index) of
the starting values
ENDPOS
For the range of X and Y values to be exponentially fitted, the row number (index) of
the ending values
Details
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
DIODEIDEALITY = 1/(EXPFITB(ANODEV, ANODEI, 2, LASTPOS(ANODEV))*0.0257)
Also see
