welding

<p>This is a highly fractionated two-level factorial design employed as a screening design
in an off-line welding experiment performed by the National Railway Corporation of Japan.
There were 16 runs and 9 experimental factors. The response variable is the observed
tensile strength of the weld, one of several quality characteristics measured. All other
variables are at plus and minus levels.</p>

datasets

A collection of algorithms and functions to aid statistical modeling. Includes limiting dilution analysis (aka ELDA), growth curve comparisons, mixed linear models, heteroscedastic regression, inverse-Gaussian probability calculations, Gauss quadrature and a secure convergence algorithm for nonlinear models. Also includes advanced generalized linear model functions including Tweedie and Digamma distributional families, secure convergence and exact distributional calculations for unit deviances.

Gordon Smyth

statmod

Statistical Modeling

welding function

<p>A data frame containing the following variables.
All the explanatory variables are numeric with two levels, <code>-1</code> and <code>1</code>.</p><table class="table">
<tr><td></td><td><b>Variable</b></td><td><b>Description</b></td></tr>
<tr><td></td><td>Rods</td><td>Kind of welding rods</td></tr>
<tr><td></td><td>Drying</td><td>Period of drying</td></tr>
<tr><td></td><td>Material</td><td>Welded material</td></tr>
<tr><td></td><td>Thickness</td><td>Thickness</td></tr>
<tr><td></td><td>Angle</td><td>Angle</td></tr>
<tr><td></td><td>Opening</td><td>Opening</td></tr>
<tr><td></td><td>Current</td><td>Current</td></tr>
<tr><td></td><td>Method</td><td>Welding method</td></tr>
<tr><td></td><td>Preheating</td><td>Preheating</td></tr>
<tr><td></td><td>Strength</td><td>Tensile strength of the weld in kg/mm. The response variable.</td></tr>
</table><p></p><p></p>

Format

Data: Tensile Strength of Welds — welding

<p>A data frame containing the following variables.
All the explanatory variables are numeric with two levels, <code>-1</code> and <code>1</code>.</p><table class='table'>
<tr><td></td><td><b>Variable</b></td><td><b>Description</b></td></tr>
<tr><td></td><td>Rods</td><td>Kind of welding rods</td></tr>
<tr><td></td><td>Drying</td><td>Period of drying</td></tr>
<tr><td></td><td>Material</td><td>Welded material</td></tr>
<tr><td></td><td>Thickness</td><td>Thickness</td></tr>
<tr><td></td><td>Angle</td><td>Angle</td></tr>
<tr><td></td><td>Opening</td><td>Opening</td></tr>
<tr><td></td><td>Current</td><td>Current</td></tr>
<tr><td></td><td>Method</td><td>Welding method</td></tr>
<tr><td></td><td>Preheating</td><td>Preheating</td></tr>
<tr><td></td><td>Strength</td><td>Tensile strength of the weld in kg/mm. The response variable.</td></tr>
</table>



welding: Data: Tensile Strength of Welds

Description

Usage

Arguments

Format

References

	Variable	Description
	Rods	Kind of welding rods
	Drying	Period of drying
	Material	Welded material
	Thickness	Thickness
	Angle	Angle
	Opening	Opening
	Current	Current
	Method	Welding method
	Preheating	Preheating
	Strength	Tensile strength of the weld in kg/mm. The response variable.