wm4: Windmill data with direction information and four reference...

Description Format Source References Examples

Description

Windspeed data collected at a test site for a windmill, and also at four nearby long-term weather site, in Northern South Dakota. Data collected every six hours for all of 2002, except that all of the month of May and a few other observations are missing.

Format

A data frame with 1114 observations on the following 14 variables.

Date

A text variable with values like "2002/1/2/6" meaning the reading at 6AM on January 2, 2002

CSpd

Wind speed (m/s) at candidate site

Spd1

Wind speed (m/s) at reference site 1

Spd2

Wind speed (m/s) at reference site 2

Spd3

Wind speed (m/s) at reference site 3

Spd4

Wind speed (m/s) at reference site 4

Spd1Lag1

Lag 1 Wind speed (m/s) at reference site 1

Spd2Lag1

Lag 1 Wind speed (m/s) at reference site 2

Spd3Lag1

Lag 1 Wind speed (m/s) at reference site 3

Spd4Lag1

Lag 1 Wind speed (m/s) at reference site 4

Spd1sin1

Spd times sin(direction) at site 1

Spd1cos1

Spd times cos(direction) at site 1

bin1

Wind direction bin for site 1

Dir1

Wind direction for site 1, in degrees

Source

Mark Ahlstrom and Rolf Miller, WindLogics, Inc.

References

Weisberg, S. (2005). Applied Linear Regression, 3rd edition. New York: Wiley, Section 10.4.1.

Examples

1

Example output

Loading required package: car
         Date CSpd   Spd1   Spd2   Spd3   Spd4 Spd1Lag1 Spd2Lag1 Spd3Lag1
1  2002/1/1/6  7.1 7.2176 6.2778 7.5920 5.9713   5.9666   8.1559   6.6031
2 2002/1/1/12  7.8 7.9405 5.4041 6.7374 6.6001   7.2176   6.2778   7.5920
3 2002/1/1/18  6.9 6.0174 4.0083 6.5218 5.2374   7.9405   5.4041   6.7374
4  2002/1/2/0  5.5 6.1646 4.7613 7.2389 5.8825   6.0174   4.0083   6.5218
5  2002/1/2/6  3.1 1.7687 5.2466 4.0083 4.1099   6.1646   4.7613   7.2389
6 2002/1/2/12  6.8 4.6471 7.7972 4.0039 5.4075   1.7687   5.2466   4.0083
  Spd4Lag1  Spd1sin1  Spd1cos1 bin1   Dir1
1   7.7464 -7.111679  1.231980   14 312.76
2   5.9713  6.446101 -4.636737   15 328.92
3   6.6001 -4.021811  4.475951   16 338.56
4   5.2374  5.963718  1.560886   16 346.89
5   5.8825 -1.729277  0.371351   14 312.80
6   4.1099 -4.433572 -1.392473   10 205.47

alr3 documentation built on May 31, 2017, 4:39 a.m.