fgl {MASS}R Documentation

Measurements of Forensic Glass Fragments

Description

The fgl data frame has 214 rows and 10 columns. It was collected by B. German on fragments of glass collected in forensic work.

Usage

fgl

Format

This data frame contains the following columns:

RI
refractive index; more precisely the refractive index is 1.518xxxx.

The remaining 8 measurements are percentages by weight of oxides.

Na
sodium
Mg
manganese
Al
aluminium
Si
silicon
K
potassium
Ca
calcium
Ba
barium
Fe
iron
type
The fragments were originally classed into seven types, one of which was absent in this dataset. The categories which occur are window float glass (WinF: 70), window non-float glass (WinNF: 76), vehicle window glass (Veh: 17), containers (Con: 13), tableware (Tabl: 9) and vehicle headlamps (Head: 29).

References

Venables, W. N. and Ripley, B. D. (2002) Modern Applied Statistics with S. Fourth edition. Springer.


[Package MASS version 7.2-33 Index]