grapes: Grape Harvest Dates
In andreas50/utsData: Example Data Sets of Unevenly Spaced Time Series

A 650-year history of grape harvest dates for 27 regions in Western Europe.

A uts_vector object. Harvest dates are presented as the number of days after 31 August.

This dataset was imported by download_grapes in June 2018 from a website by the NOAA National Climatic Data Center.

Daux, V., I. Garcia de Cortazar-Atauri, P. Yiou, I. Chuine, E. Garnier, E. Le Roy Ladurie, O. Mestre, and J. Tardaguila. 2011. An open-database of Grape Harvest dates for climate research: data description and quality assessment. Climate of the Past, Vol. 8, pp. 1403-1418, 2012 www.clim-past.net/8/1403/2012/ doi:10.5194/cp-8-1403-2012

data(grapes)
plot(grapes$Burgundy)

# Connect observations less than two years apart by a line
plot(grapes$Bordeaux, max_dt=dyears(2), type="o", cex=0.5)

# Plot 20-year two-sided rolling average of Burgundy harvest dates
if (requireNamespace("utsOperators", quietly=TRUE)) {
  plot(utsOperators::rolling_apply(grapes$Burgundy, width=dyears(20), FUN=mean, align="center"))
}