apricotFFD {spphpr}R Documentation

First flowering date records of Prunus armeniaca

Description

The data consist of the first flowering date records of Prunus armeniaca at the Summer Palace (39{}^{\circ}54'38'' N, 116{}^{\circ}8'28'' E, 50 m a.s.l.) in Beijing of China between 1963 and 2010. Data source: Chinese Phenological Observation Network (Guo et al., 2015).

Usage

data(apricotFFD)

Details

In the data set, there are two columns of vectors: Year, and Time. Code saves the recording years; and Time saves 1963-2010 first flowering dates of Prunus armeniaca in day of year.

References

Guo, L., Xu, J., Dai, J., Cheng, J., Wu, H., Luedeling, E. (2015) Statistical identification of chilling and heat requirements for apricotflower buds in Beijing, China. Scientia Horticulturae 195, 138-144. doi:10.1016/j.scienta.2015.09.006

Examples

data(apricotFFD)
attach(apricotFFD)

dev.new()
par1 <- par(family="serif")
par2 <- par(mar=c(5, 5, 2, 2))
par3 <- par(mgp=c(3, 1, 0))
plot( Year, Time, asp = 1, cex.lab = 1.5, cex.axis = 1.5, 
      xlab = "Year", ylab = "First flowering date (day of year)" ) 
par(par1)
par(par2)
par(par3)

# graphics.off()

[Package spphpr version 0.1.4 Index]