stack.dat: Brownlee's Stack-Loss Data

In robust: Port of the S+ "Robust Library"

Description

These data are from the operation of a plant for the oxidation of ammonia to nitric acid, measured on 21 consecutive days.

Usage

  data(stack.dat)

Format

This data frame contains the following variables:

Loss

the percentage of ammonia lost (times 10).

Air.Flow

air flow into the plant

Water.Temp

cooling water inlet temperature.

Acid.Conc.

acid concentration as a percentage (coded by subtracting 50 and then multiplying by 10).

Source

Brownlee, K.A. (1965). Statistical Theory and Methodology in Science and Engineering. New York: John Wiley & Sons, Inc.

Examples

  data(stack.dat)
  stack.dat

Example output

Loading required package: fit.models
   Loss Air.Flow Water.Temp Acid.Conc.
1    42       80         27         89
2    37       80         27         88
3    37       75         25         90
4    28       62         24         87
5    18       62         22         87
6    18       62         23         87
7    19       62         24         93
8    20       62         24         93
9    15       58         23         87
10   14       58         18         80
11   14       58         18         89
12   13       58         17         88
13   11       58         18         82
14   12       58         19         93
15    8       50         18         89
16    7       50         18         86
17    8       50         19         72
18    8       50         19         79
19    9       50         20         80
20   15       56         20         82
21   15       70         20         91

robust documentation built on May 2, 2019, 5:20 p.m.