aphids

The dataset comes from an ecological survey of the pea aphid (Acyrthosiphon pisum). In three fields, 15 randomly selected triplets of adjacent bean plants were inspected, and the total number of pea aphids on each triplet was recorded. The dataset includes the explanatory factor Field (three levels), a Sample identifier for the 15 sampling locations within each field, and the response variable AphidCount, representing the total aphid count per sample, and is used to assess whether aphid infestation differs among fields.

datasets

All data in the book "Statistical Methods in Biology" by Welham et al. (2015) <doi:10.1201/b17336> with a corresponding documentation and illustrative analysis of the data.

Emi Tanaka

smbdata

Data from "Statistical Methods in Biology"

Sue Welham

Salvador Gezan

Suzanne Clark

Andrew Mead

aphids function

A data frame with 45 rows and 4 variables: <code>ID</code>, <code>Field</code>, <code>Sample</code>, <code>AphidCount</code>.<dl>
 <dt>ID</dt>
<dd>Factor. Unique identifier for each observation.</dd> <dt>Field</dt>
<dd>Factor. Identifier for the field in which the sample was collected.</dd> <dt>Sample</dt>
<dd>Factor. Sample point number within each field.</dd> <dt>AphidCount</dt>
<dd>Integer. Number of aphids counted in the sample.</dd>
</dl>

Format

Pea aphids survey — aphids

A data frame with 45 rows and 4 variables: <code>ID</code>, <code>Field</code>, <code>Sample</code>, <code>AphidCount</code>.<dl>
 <dt>ID</dt>
<dd>Factor. Unique identifier for each observation.</dd>

 <dt>Field</dt>
<dd>Factor. Identifier for the field in which the sample was collected.</dd>

 <dt>Sample</dt>
<dd>Factor. Sample point number within each field.</dd>

 <dt>AphidCount</dt>
<dd>Integer. Number of aphids counted in the sample.</dd>


</dl>

aphids: Pea aphids survey

Description

Usage

Arguments

Format

Examples