Initial CRAN submission.
New analysis functions: load_india_boundaries(),
spatial_mean(), compare(),
cross_correlation(), anomaly(),
seasonal_cycle(), peak_month(),
seasonal_stat(), regrid() and
dewpoint_from_relative_humidity().
New ggplot2 plot functions: plot_map(),
plot_series(), plot_dual_axis(),
plot_ccf(), plot_scatter(),
plot_bars() and plot_heatmap().
era5ify_*() with frequency = "monthly"
or "yearly" return totals for accumulated variables such as
precipitation (they returned the mean daily value), and always have
year (and month) columns.
era5ify_point() snaps its download box to the 0.25
degree grid, so the nearest cell is a true ERA5 grid point.
era5ify_*() with frequency = "yearly"
download the ERA5 monthly-means product, as in the Python package.
Before, they downloaded one value at 12:00 for each day.
Shared test cases in parity check that R and Python
give the same results.