Command FAREA
FAREA peaks
/
GUESS(gg)
MIN(mn)
MAX(mx)
DIFF(pref)
SUM(pref)
QUOT(pref)
FIX
VARY
RELATIVE
NOLIM
LIST
EON
EOFF
Purpose
Defines values and attributes of peak areas.
Example
FAREA 3 / sum(4) g(10000) r
fixes the sum of the areas of peaks number 3 and 4 to 10000.
Peak number 4 is the reference peak (not changed)
FAREA 3 / sum(4) g(10000)
The area of peak number 3 is set to 10000.
The sum of the areas of peaks number 3 and 4 is fixed at the value
10000 + the area of peak number 4.
Parameter PEAKS
List of peak numbers. peaks=* means all peaks.
Parameter GUESS(gg)
List of guess values for peak areas.
If only a single value is given it is assigned to all specified peaks.
Parameter MIN(mn)
List of lower limits for peak areas.
Must not exceed the current values of peak areas.
Further conventions see command parameter GUESS().
Parameter MAX(mx)
List of upper limits for peak areas.
Must not be exceeded by the current values of peak areas.
Further conventions see command parameter GUESS().
Parameters DIFF(pref),SUM(pref),QUOT(pref)
The specified peak areas are relatively fixed.
The differences, sums or quotients, respectively,
of the specified peaks and the reference peak pref
are held constant during iterations.
Parameter FIX
The specified peak areas are held constant during iterations
Parameter VARY
The specified peak areas are allowed to vary during iterations
Parameter RELATIVE
For relatively fixed peak areas (DIFF() SUM()QUOT())
the guess values (GUESS()) are assumed
to be difference, sum or quotient with respect to the corresponding
reference peak parameters.
Parameter NOLIM
Limits of the specified areas are set to infinity
Parameter LIST
List the specified peak areas
Parameter EON
Enable asymmetric error analysis for peak areas.
This might be time consuming
Parameter EOFF
Disable asymmetric error analysis for peak areas.