Calculate Anomaly Relative to a Baseline Climatology
Usage
wapor_calc_anomaly_baseline(current, baseline_mean, baseline_sd = NULL)
Arguments
- current
SpatRaster. Current observation raster.
- baseline_mean
SpatRaster. Historical baseline mean raster.
- baseline_sd
SpatRaster. Optional historical baseline standard deviation.
Value
If baseline_sd is provided, returns Z-score anomaly raster.
Otherwise, returns absolute difference (current - baseline_mean).
Examples
curr <- terra::rast(nrows=5, ncols=5, vals=450)
base_m <- terra::rast(nrows=5, ncols=5, vals=400)
diff_r <- wapor_calc_anomaly_baseline(curr, base_m)