# Validation of Seasonal Weather Forecasts

## Documentation for package ‘SeaVal’ version 1.2.0

- DESCRIPTION file.
- Package NEWS.

## Help Pages

add_climatology | Add climatology to a data table
add_country | Same as add_country_names
add_country_names | Add country names to a data table with lon/lat coordinates
add_tercile_cat | Add a tercile-category column to a data table
add_tercile_probs | Add tercile probabilities to ensemble forecasts
are_all_elements_within_eps | Check if all elements of x are within tolerance eps of any element in y
by_cols_ens_fc_score | Auxiliary function
by_cols_terc_fc_score | Auxiliary function
by_cols_terc_fc_score_sp | Auxiliary function
checks_ens_fc_score | Auxiliary function for scores of ensemble forecasts.
checks_terc_fc_score | Auxiliary function for scores for tercile forecasts.
chirps_dir | CHIRPS directory
chirps_monthly | Monthly mean precipitation
chirps_ver_map_quantiles | Calculates and saves the quantiles of CHIRPS data required for verification maps.
climatology_ens_forecast | Returns a leave-one-year-out climatology-based ensemble forecast
climatology_threshold_exceedence | Get climatological prediction for exceedence probabilities.
combine | Combine two data tables
complete_regular_grid | Expand Regular Spatial Grid
convert_monthly_to_seasonal | Convert a data table from monthly to seasonal format
CPA | Coefficients of Predictive Ability
create_diagram_by_level | Auxiliary function to simplify grouping for diagrams
CRPS | Continuous Ranked Probability Score
CRPSS | Continuous Ranked Probability Skill Score
crps_aux | Auxiliary function for calculating crps.
crps_aux_esc | Auxiliary function for calculating crps with ensemble size correction by Ferro et al. 2008.
data_dir | Auxiliary function to access and change the directory used to load and save data.
delete_redundant_files | Auxiliary function cleaning out the directories, called at the end of the CHIRPS download.
dimvars | Get dimension variables
disc_score_dt | Generalized Discrimination score
DISS | Generalized discrimination score
download_chirps_monthly | Download monthly CHIRPS-data
download_chirps_monthly_high | Auxiliary function called by download_chirps_monthly
download_chirps_monthly_low | Auxiliary function called by download_chirps_monthly
download_chirps_prelim_aux | Auxiliary function for downloading the preliminary CHIRPS monthly data
dt_to_netcdf | Write a netcdf from a long data table
EA_country_names | Get names of countries in east Africa
ecmwf_monthly | Monthly mean precipitation forecast example dataset
EIR | Effective Interest Rate
fc_cols | Forecast column names
get_mask | Function to create a mask of dry regions from CHIRPS
get_quantiles | Calculate quantiles from a data table
get_terciles | get terciles from a data table
ggplot_dt | plotting function for spatial data
ggplot_dt_gha_map | Plotting function with different map for Greater Horn of Africa
ggplot_dt_shf | Plotting function with different map for Greater Horn of Africa
GHA_extent | GHA-bounding-box
gha_plot | Plotting function with different map for Greater Horn of Africa
grid_info | Retrieve spatial grid information from a data table
HS | Hit score
HSS | Hit Skill Score
IGS | Ignorance Score
IGSS | Ignorance Skill score
indicator_times_value_aux | Auxiliary function for multiplying two numbers such that 0 x infty is 0. Needed for the ignorance score: 0log(0) should be 0.
load_chirps | Function for loading CHIRPS (monthly) data.
lt_cols | Data table column names that are recognized as leadtime
MB | Multicategory Brier score
MBS | Multicategory Brier Skill score
modify_dt_map_plotting | Auxiliary function for checking dimensions for map-plotting
MSD_to_YM | Converts time given as 'months since date' (MSD) into years and months (YM)
MSE | Mean Square Error of ensemble forecasts.
MSES | Mean Square Error Skill score
netcdf_to_dt | function for converting netcdfs to long data tables.
obs_cols | Observation column names
obs_dimvars | Auxiliary function returning observation dimvars.
PCC | Pearson Correlation Coefficient
profit_graph | (Accumulative) profit graphs
REL | Reliability score
rel_diag | Reliability Diagrams for tercile forecasts
rel_diag_vec | Reliability diagram from vectors of probabilities and observations
RES | Resolution score
restrict_to_confer_region | restricts data to the Greater Horn of Africa
restrict_to_country | restricts data to a specified country
restrict_to_GHA | restricts data to the Greater Horn of Africa
ROCS | ROC-score/Area Under Curve(AUC)
ROC_curve | ROC curve for tercile forecasts
roc_curve_vec | ROC curves
roc_score_vec | ROC score (AUC)
round_probs | auxiliary function for rounding probabilities
RPS | Ranked Probability score
RPSS | Ranked Probability skill score
run_dimension_check_ens_fc_score | Auxiliary Function
run_dimension_check_terc_forecast | Auxiliary Function
season_strings_to_int | Auxiliary function for decoding season-strings
set_spatial_grid | Set Spatial Grid Attributes to a Data Table
space_dimvars | Auxiliary function
SRC | Compute the slope of the reliability curve
tc_cols | Tercile column names
tendency_diag | Tendency diagram from a data table containing tercile forecasts.
tercile_plot | Function for plotting terciles
tfc_from_efc | Get tercile probability forecast from ensemble forecasts
tfc_gha_plot | Plotting function with different map for Greater Horn of Africa
tfc_plot | plotting function for tercile forecasts
time_dimvars | Auxiliary function
upscale_chirps | Upscales monthly CHIRPS data to a coarser grid
upscale_regular_lon_lat | Function for matching data between different grids
ver_map | Plot a verification map of percentiles
ver_map_chirps | Plot a verification map of percentiles based on precomputed CHIRPS quantiles.