ortho.proj

Orthogonal projection of observed cases onto road network.

datasets

Amends errors, augments data and aids analysis of John Snow's map
of the 1854 London cholera outbreak.

Peter Li 

cholera

Amend, Augment and Aid Analysis of John Snow's Cholera Map

ortho.proj function

A data frame with 5 variables that records the position of the orthogonal projection of the 578 cases onto the network of roads.<dl>
 <dt><code>case</code></dt>
<dd>numeric case ID</dd> <dt><code>road.segment</code></dt>
<dd>"address" road segment</dd> <dt><code>x.proj</code></dt>
<dd>x-coordinate</dd> <dt><code>y.proj</code></dt>
<dd>y-coordinate</dd> <dt><code>dist</code></dt>
<dd>distance to home road segment</dd> <dt><code>type</code></dt>
<dd>type of distance: orthogonal to road or Euclidean to endpoint</dd> 
</dl>

Format

Orthogonal projection of observed cases onto road network. — ortho.proj

A data frame with 5 variables that records the position of the orthogonal projection of the 578 cases onto the network of roads.<dl>
 <dt><code>case</code></dt>
<dd>numeric case ID</dd>

 <dt><code>road.segment</code></dt>
<dd>"address" road segment</dd>

 <dt><code>x.proj</code></dt>
<dd>x-coordinate</dd>

 <dt><code>y.proj</code></dt>
<dd>y-coordinate</dd>

 <dt><code>dist</code></dt>
<dd>distance to home road segment</dd>

 <dt><code>type</code></dt>
<dd>type of distance: orthogonal to road or Euclidean to endpoint</dd>

 
</dl>

ortho.proj: Orthogonal projection of observed cases onto road network.

Description

Usage

Arguments

Format