cshp {cshapes}R Documentation

Access the CShapes dataset in R

Description

The cshp function makes the cshapes dataset available for usage in R. If no date is given, it returns a SpatialPolygonsDataFrame with the complete CShapes dataset. If specified, the date is used to create a snapshot of the dataset, containing all cshapes polygons active at the given date.

Usage

  cshp(date=NA)

Arguments

date The date for which the cshapes polygons should be extracted. This argument must be of type Date and must be in the range 1/1/1946 - 30/6/2008. If omitted, the complete dataset is returned.

Value

A SpatialPolygonsDataFrame, containing the complete CShapes dataset, or the CShapes snapshot for the specified date.

Author(s)

Nils B. Weidmann

See Also

SpatialPolygonsDataFrame

Examples

# Retrieve the dataset
cshp.data <- cshp()

# Get summary statistics
summary(cshp.data)

# Extract Switzerland 
switzerland <- cshp.data[cshp.data$COWCODE==225,]

# Plot Switzerland
plot(switzerland)

# Extract a snapshot of cshapes as of June 30, 2002
cshp.2002 <- cshp(date=as.Date("2002-6-30"))

[Package cshapes version 0.2-2 Index]