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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><title>R: Measurements of Forensic Glass Fragments</title> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link rel="stylesheet" type="text/css" href="R.css" /> </head><body> <table width="100%" summary="page for fgl {MASS}"><tr><td>fgl {MASS}</td><td style="text-align: right;">R Documentation</td></tr></table> <h2> Measurements of Forensic Glass Fragments </h2> <h3>Description</h3> <p>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. </p> <h3>Usage</h3> <pre> fgl </pre> <h3>Format</h3> <p>This data frame contains the following columns: </p> <dl> <dt><code>RI</code></dt><dd> <p>refractive index; more precisely the refractive index is 1.518xxxx. </p> <p>The next 8 measurements are percentages by weight of oxides. </p> </dd> <dt><code>Na</code></dt><dd><p>sodium.</p> </dd> <dt><code>Mg</code></dt><dd><p>manganese.</p> </dd> <dt><code>Al</code></dt><dd><p>aluminium.</p> </dd> <dt><code>Si</code></dt><dd><p>silicon.</p> </dd> <dt><code>K</code></dt><dd><p>potassium.</p> </dd> <dt><code>Ca</code></dt><dd><p>calcium.</p> </dd> <dt><code>Ba</code></dt><dd><p>barium.</p> </dd> <dt><code>Fe</code></dt><dd><p>iron.</p> </dd> <dt><code>type</code></dt><dd> <p>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). </p> </dd> </dl> <h3>References</h3> <p>Venables, W. N. and Ripley, B. D. (2002) <em>Modern Applied Statistics with S.</em> Fourth edition. Springer. </p> <hr /><div style="text-align: center;">[Package <em>MASS</em> version 7.3-51.4 <a href="00Index.html">Index</a>]</div> </body></html>