ustemp {SemiPar} | R Documentation |
U.S. temperature data
Description
The ustemp
data frame has 56 observations on the temperature
and location of 56 U.S. cities.
Usage
data(ustemp)
Format
This data frame contains the following columns:
- city
character string giving name of city and state (two-letter abbreviation).
- min.temp
average minimum January temperature.
- latitude
degrees latitude (north of Equator).
- longitude
degrees longitude (west of Greenwich).
Source
Peixoto, J.L. (1990). A property of well-formulated polynomial regression models. American Statistician, 44, 26-30.
References
Ruppert, D., Wand, M.P. and Carroll, R.J. (2003)
Semiparametric Regression Cambridge University Press.
http://stat.tamu.edu/~carroll/semiregbook/
Examples
library(SemiPar)
data(ustemp)
attach(ustemp)
grey.levs <- min.temp+20
col.vec <- paste("grey",as.character(grey.levs),sep="")
plot(-longitude,latitude,col=col.vec,pch=16,cex=3,xlim=c(-130,-60))
text(-longitude,latitude,as.character(city))
[Package SemiPar version 1.0-4.2 Index]