timespline: 2D smoothed plots of data by year and day of year.
In ozjimbob/ecbtools: Environmental Change Biology Tools

Description Usage Arguments Value Author(s)

This function produces a 2D field plot of a value, with the x-axis representing year, and the y-axis representing day of year (julian day). A raw plot, and a plot with a 2D spline smooth are produced. These plots are useful for visually examining seasonal trends and cycles in meteorological variables over long time periods.

1	timespline(data, datevar, plotvar, k = 40, hinge = F, col = div_pal(256))

`data`	A data frame containing the input data.
`datevar`	The name of the column in the data frame containing the date of the observation. This should contain a Date-type value, as formatted by the `as.Date` function.
`plotvar`	The name of column in the data frame containing the numeric variable to plot.
`k`	The degree of spline smoothing to be performed. Higher values give more detailed plots, but may overfit.
`hinge`	True/False - should the data be hinged over the middle of the year? If false, the y-axis of the plot represents day of year from 1 to 365. If true, values range from 0 to 1 representing "winterness" and "summerness".
`col`	A palette specification.