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

datasets

Functions and datasets to support Venables and Ripley,
"Modern Applied Statistics with S" (4th edition, 2002).

Brian Ripley

MASS

Support Functions and Datasets for Venables and Ripley's MASS

Bill Venables

Kurt Hornik

Albrecht Gebhardt

David Firth

fgl function

This data frame contains the following columns:<dl>
 <dt><code>RI</code></dt>
<dd>refractive index; more precisely the refractive index is 1.518xxxx.
The next 8 measurements are percentages by weight of oxides.</dd> <dt><code>Na</code></dt>
<dd>sodium.</dd> <dt><code>Mg</code></dt>
<dd>manganese.</dd> <dt><code>Al</code></dt>
<dd>aluminium.</dd> <dt><code>Si</code></dt>
<dd>silicon.</dd> <dt><code>K</code></dt>
<dd>potassium.</dd> <dt><code>Ca</code></dt>
<dd>calcium.</dd> <dt><code>Ba</code></dt>
<dd>barium.</dd> <dt><code>Fe</code></dt>
<dd>iron.</dd> <dt><code>type</code></dt>
<dd>The fragments were originally classed into seven types, one of which
 was absent in this dataset. The categories which occur are
 window float glass (<code>WinF</code>: 70),
 window non-float glass (<code>WinNF</code>: 76),
 vehicle window glass (<code>Veh</code>: 17),
 containers (<code>Con</code>: 13),
 tableware (<code>Tabl</code>: 9) and
 vehicle headlamps (<code>Head</code>: 29).</dd> 
</dl>

Format

Measurements of Forensic Glass Fragments — fgl

This data frame contains the following columns:<dl>
 <dt><code>RI</code></dt>
<dd>refractive index; more precisely the refractive index is 1.518xxxx.
The next 8 measurements are percentages by weight of oxides.</dd>

 <dt><code>Na</code></dt>
<dd>sodium.</dd>

 <dt><code>Mg</code></dt>
<dd>manganese.</dd>

 <dt><code>Al</code></dt>
<dd>aluminium.</dd>

 <dt><code>Si</code></dt>
<dd>silicon.</dd>

 <dt><code>K</code></dt>
<dd>potassium.</dd>

 <dt><code>Ca</code></dt>
<dd>calcium.</dd>

 <dt><code>Ba</code></dt>
<dd>barium.</dd>

 <dt><code>Fe</code></dt>
<dd>iron.</dd>

 <dt><code>type</code></dt>
<dd>The fragments were originally classed into seven types, one of which
 was absent in this dataset. The categories which occur are
 window float glass (<code>WinF</code>: 70),
 window non-float glass (<code>WinNF</code>: 76),
 vehicle window glass (<code>Veh</code>: 17),
 containers (<code>Con</code>: 13),
 tableware (<code>Tabl</code>: 9) and
 vehicle headlamps (<code>Head</code>: 29).</dd>

 
</dl>

fgl: Measurements of Forensic Glass Fragments

Description

Usage

Arguments

Format

References