GISTools (version 1.0-2)

vulgaris: Phenology data for North American lilacs

Description

Data set from Schwartz, M.D. and J.M. Caprio, 2003, North American First Leaf and First Bloom Lilac Phenology Data, IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2003-078. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.

Usage

data(vulgaris)

Format

• vulgaris Syringa Vulgaris Observation Stations SpatialPointsDataFrame - geographical projection

• vulgaris2 Syringa Vulgaris Observation Stations SpatialPointsDataFrame - equal area projection

• us_states States of US SpatialPolygonsDataFrame - geographical projection

• us_states2 States of US SpatialPolygonsDataFrame - equal area projection

Examples

# Read in the data
data(vulgaris)
# Split the plot in two
opar <- par(mfrow=c(2,1))
# Plot US states
plot(us_states)
# Add Locations of observation stations
plot(vulgaris,add=TRUE,pch=16,col='red')
# Plot a histogram of year of observation next to this
hist(vulgaris$Year)
par(opar)