alaska.pipeline {UsingR} | R Documentation

## Comparison of in-field and laboratory measurement of defects

### Description

The Alaska pipeline data consists of in-field ultrasonic measurements of the depths of defects in the Alaska pipeline. The depth of the defects were then re-measured in the laboratory. These measurements were performed in six different batches.

### Usage

    data(alaska.pipeline)

### Format

A data frame with 107 observations on the following 3 variables.

field.defect
  Depth of defect as measured in field
lab.defect
  Depth of defect as measured in lab
batch
  One of 6 batches

### Source

From an example in Engineering Statistics Handbook from http://www.itl.nist.gov/div898/handbook/

### Examples

    data(alaska.pipeline)
    res = lm(lab.defect ~ field.defect, alaska.pipeline)
    plot(lab.defect ~ field.defect, alaska.pipeline)
    abline(res)
    plot(fitted(res),resid(res))

[Package UsingR version 0.1-4 Index]