BUCHI NIRCal - Manual (Page 190)

NIRCal 5.5 Software Manual
190 NIRCal 5.5 Manual, Version A
3.18.58 Property F-Test forward
Description Significance of additional PCs.
Use For secondary principal component selection.
Method PCR / PLS
Matrices ID 38
Tip
Details Alternative for proofing the robustness of a calibration with a backward
search operation is to start at a certain calibration checking for additional
PCs that will improve the SEP value significantly.
Related Topic Property F-Test backward
3.18.59 Property Interference
Description Interference = Property Score Extension / Property Nearest Neighbor
Use Judgement of the influence of the property for the cluster separation.
Method Cluster (CLU)
Matrices ID 61
Tip Small interference indicates a good influence of the property for the
calibration.
Details Property Interference is the relationship between the size of a cluster and
distance to the nearest property.
The interference values are listed in the calibration protocol.
Related Topic Property Score Extension , Property Nearest Neighbor
3.18.60 Property missing Values
Description Spectra, which have no defined property value (0 = value missing; 1 = value
available)
NOTE
This has no relevance in NIRCal file-mode, only in database-mode.
Use Find spectra, which have no property value
Method PCR / PLS / Cluster (CLU) / SIMCA / MLR
Matrices ID 115
Tip Edit the property values in Manager Console/ Sample Management
Details Spectra without property values can not be used for the C- and V-Set.
Related Topic Original Property
Interpretation:

1 means: there is defined property value,

0 means: missing property value = there is no defined property value.
3.18.61 Property Nearest Neighbor
Description The smallest Mahalanobis distance between the property mean to the next
property center.
Use Judge the property separation.
Method Cluster (CLU)
Matrices ID 60
Tip High values indicate good separation.
Details These values together with the next neighbors are listed in the calibration
protocol.
Related Topic Scores