shotgun.df

<p>In order to test the validity of range-of-fire estimates obtained by
  the application of regression analysis to shotgun pellet patterns, a
  blind study was conducted in which questioned pellet patterns were
  fired at randomly selected ranges between 3.0 and 15.2 m (10 and 50
  ft) with two different 12-gauge shotguns. each firing a different type
  of buckshot cartridge. Test firings at known ranges were also
  conducted with the same weapons and ammunition.</p>

datasets

Data and miscellanea to support the book "Introduction to Data analysis with R for Forensic Scientists." This book was written by James Curran and published by CRC Press in 2010 (ISBN: 978-1-4200-8826-7).

James Curran

dafs

Data Analysis for Forensic Scientists

shotgun.df function

<p>A data frame with 3 variables:</p><table><tr><td>
  [,1] </td>
<td> range </td>
<td> numeric </td>
<td> the range in feet of the firing </td>
</tr><tr><td>
  [,2] </td>
<td> sqrt.area </td>
<td> numeric </td>
<td> the square root of the area of the smallest rectangle that would enclose the pellet pattern </td>
</tr><tr><td>
  [,3] </td>
<td> model </td>
<td> factor </td>
<td> the model of shotgun used in the experiment </td>
</tr></table>

shotgun.df: Shotgun data

Description

Usage

Arguments

Format

References

[,1]	range	numeric	the range in feet of the firing
[,2]	sqrt.area	numeric	the square root of the area of the smallest rectangle that would enclose the pellet pattern
[,3]	model	factor	the model of shotgun used in the experiment