heli

A central composite design with 4 factors in 2 blocks. These data
 comprise a <code>coded.data</code> object.

datasets

Provides functions to generate response-surface designs,
fit first- and second-order response-surface models,
make surface plots, obtain the path of steepest ascent,
and do canonical analysis. A good reference on these methods
is Chapter 10 of Wu, C-F J and Hamada, M (2009)
"Experiments: Planning, Analysis, and Parameter Design Optimization"
ISBN 978-0-471-69946-0. An early version of the package is
documented in Journal of Statistical Software <doi:10.18637/jss.v032.i07>.

Russell Lenth

Response-Surface Analysis

heli function

A data frame with 30 observations on the following 7 variables.
 Each observation reflects the results of 10 replicated flights under the 
 same experimental conditions.<dl>
 <dt><code>block</code></dt>
<dd>a factor with levels <code>1</code> <code>2</code>.
 Block 1 consists of 18 observations (a full factorial plus two center points).
 Block 2 consists of 12 observations -- 8 axis points and 4 center points.</dd> <dt><code>x1</code></dt>
<dd>a numeric vector. Coded wing area, <code>x1 ~ (A - 12.4)/.6</code></dd> <dt><code>x2</code></dt>
<dd>a numeric vector. Coded length ratio, <code>x2 ~ (R - 2.52)/.26</code></dd> <dt><code>x3</code></dt>
<dd>a numeric vector. Coded body width, <code>x3 ~ (W - 1.25)/.25</code></dd> <dt><code>x4</code></dt>
<dd>a numeric vector. Coded body length, <code>x4 ~ (L - 2)/.5</code></dd> <dt><code>ave</code></dt>
<dd>a numeric vector. Average flight time, in csec.</dd> <dt><code>logSD</code></dt>
<dd>a numeric vector. 100*log(SD of times).</dd> 
</dl>

Format

Paper Helicopter Data — heli

A data frame with 30 observations on the following 7 variables.
 Each observation reflects the results of 10 replicated flights under the 
 same experimental conditions.<dl>
 <dt><code>block</code></dt>
<dd>a factor with levels <code>1</code> <code>2</code>.
 Block 1 consists of 18 observations (a full factorial plus two center points).
 Block 2 consists of 12 observations -- 8 axis points and 4 center points.</dd>

 <dt><code>x1</code></dt>
<dd>a numeric vector. Coded wing area, <code>x1 ~ (A - 12.4)/.6</code></dd>

 <dt><code>x2</code></dt>
<dd>a numeric vector. Coded length ratio, <code>x2 ~ (R - 2.52)/.26</code></dd>

 <dt><code>x3</code></dt>
<dd>a numeric vector. Coded body width, <code>x3 ~ (W - 1.25)/.25</code></dd>

 <dt><code>x4</code></dt>
<dd>a numeric vector. Coded body length, <code>x4 ~ (L - 2)/.5</code></dd>

 <dt><code>ave</code></dt>
<dd>a numeric vector. Average flight time, in csec.</dd>

 <dt><code>logSD</code></dt>
<dd>a numeric vector. 100*log(SD of times).</dd>

 
</dl>

heli: Paper Helicopter Data

Description

Usage

Arguments

Format