BUCHI NIRCal - Manual (Page 57)

Chemometrics
NIRCal 5.5 Manual, Version A 57
Custom assign
Group to Spectra This is the default method when the CV Group Selector is started . In this
mode it is possible to display a plot (Group Plot) and/or a table (Group
Table) with the CV Group Index
Buttons / Selections
Method
Select a method from the drop-down list.
Group Table Display table: CV Group Index.
Enabled only for the method: Custom assign Group to Spectra
Group Plot Display plot: CV Group Index.
Enabled only for the method: Custom assign Group to Spectra
OK OK
Cancel Cancel
Number of
Groups
Spectra per
Group
Start at Character Used for Spectra Name
Default is 1, the character comparison starts at the first character. (e.g. Start
at Character=10 then all Spectra names that are shorter than 10 characters
like "Name xy","Batch01","1" are grouped into 1 group.
Property
Number of
Segment
Number of
Characters Used for Spectra Name
Default is 500 characters, up to 500 characters are compared.
Short form Enabled : e.g. 1-5
Disabled: e.g. 1,2,3,4,5
List to Clipboard The group list is copied to the clipboard.
Highlight Group All spectra of a group are highlighted red in NIRCal-plots.
Plot Group Select a group and plot
After creating or changing the groups, the CV calculation should be performed again.
CV Methods
One leave out (FCV)
Each spectrum represents a group: Full Cross Validation.