ColoCan: Colorectal Cancer Mortality Rate in Indiana Counties

ColoCanR Documentation

Colorectal Cancer Mortality Rate in Indiana Counties

Description

County-wise death counts of colorectal cancer patients in Indiana during years 2000 through 2004.

Usage

data(ColoCan)

Format

A data frame containing 184 observations on the following variables.

event Death counts.
pop Population from Census 2000.
sex Gender of population.
wrt Proportion of Whites.
brt Proportion of Blacks.
ort Proportion of other minorities.
lat Latitude.
lon Longitude.
geog Geographic location, derived from lat and lon.
scrn Colorectal cancer screening rate.
name County name.

Details

geog was generated from lat and lon using the code given in the example section.

Source

Dr. Tonglin Zhang.

References

Zhang, T. and Lin, G. (2009), Cluster detection based on spatial associations and iterated residuals in generalized linear mixed models. Biometrics, 65, 353–360.

Examples

## Converting latitude and longitude to x-y coordinates
## The 49th county is Marion, where Indianapolis is located.
## Not run: ltln2xy <- function(latlon,latlon0) {
  lat <- latlon[,1]*pi/180; lon <- latlon[,2]*pi/180
  lt0 <- latlon0[1]*pi/180; ln0 <- latlon0[2]*pi/180
  x <- cos(lt0)*sin(lon-ln0); y <- sin(lat-lt0)
  cbind(x,y)
}
data(ColoCan)
latlon <- as.matrix(ColoCan[,c("lat","lon")])
ltln2xy(latlon,latlon[49,])
## Clean up
rm(ltln2xy,ColoCan,latlon)
## End(Not run)

gss documentation built on Oct. 12, 2024, 1:08 a.m.

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