welding


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.


datasets

A collection of algorithms and functions to aid statistical modeling. Includes growth curve comparisons, limiting dilution analysis (aka ELDA), mixed linear models, heteroscedastic regression, inverse-Gaussian probability calculations, Gauss quadrature and a secure convergence algorithm for nonlinear models.  Includes advanced generalized linear model functions that implement secure convergence, dispersion modeling and Tweedie power-law families.

Gordon Smyth

statmod

Statistical Modeling

welding function

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

Format

<a href="http://www.statsci.org/data/general/welding.html">http://www.statsci.org/data/general/welding.html</a>

Source

<a href = 'http://www.statsci.org/data/general/welding.html'>http://www.statsci.org/data/general/welding.html</a>

welding: Data: Tensile Strength of Welds

Description

Usage

Arguments

Format

Source

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.