tfc_from_efc: Get tercile probability forecast from ensemble forecasts

In SeaVal: Validation of Seasonal Weather Forecasts

Get tercile probability forecast from ensemble forecasts

Description

The function takes a data table containing ensemble predictions and reduces it to predicted tercile probabilities. The data table should either have a column 'tercile_cat' or it will be generated in the process (by add_tercile_cat). In particular, if you don't know the tercile category of the ensemble predictions, your data table should contain hindcasts as well, such that the tercile categories are calculated correctly. The probability for 'below', for example, is the fraction of ensemble members predicting below normal (for this coordinate).

Usage

tfc_from_efc(dt, by = setdiff(dimvars(dt), "member"), keep_cols = NULL, ...)

Arguments

dt	The data table.
by	Names of columns to group by.
keep_cols	A vector of column names that you want to keep. Column names in by are kept automatically.
...	passed on to add_tercile_probs.

Value

A new data table with tercile forecasts

Examples

test_dt = ecmwf_monthly[lat < 0 & month == 11]
tfc = tfc_from_efc(test_dt)

SeaVal documentation built on June 24, 2024, 5:15 p.m.