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 next 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 7.3-51.3 Index]