CorrDiff: Calculate correlation difference between a forecast and a...

In SpecsVerification: Forecast Verification Routines for Ensemble Forecasts of Weather and Climate

Description

Calculate correlation difference between a forecast and a reference forecast, and assess uncertainty

Usage

CorrDiff(
  fcst,
  fcst.ref,
  obs,
  N.eff = NA,
  conf.level = 0.95,
  handle.na = "na.fail"
)

Arguments

fcst	vector of forecasts
fcst.ref	vector of reference forecasts
obs	vector of observations
N.eff	user-defined effective sample size to be used in hypothesis test and for confidence bounds; if NA, the length of 'obs' is used after removing missing values; default: NA
conf.level	confidence level for the confidence interval; default = 0.95
handle.na	how should missing values in forecasts and observations be handled; possible values are 'na.fail' and 'only.complete.triplets'; default: 'na.fail'

Value

vector with correlation difference, one-sided p-value, and central confidence interval at the user-defined confidence level

References

Steiger (1980): Tests for comparing elements of a correlation matrix. Psychological Bulletin. doi: 10.1037/0033-2909.87.2.245 Zou (2007): Toward using confidence intervals to compare correlations. Psychological Methods. doi: 10.1037/1082-989X.12.4.399

See Also

Corr

Examples

data(eurotempforecast)
CorrDiff(rowMeans(ens), ens[, 1], obs)

Example output

  corr.diff     p.value           L           U 
 0.12159229  0.07542813 -0.04864057  0.35443360 

SpecsVerification documentation built on March 26, 2020, 7:55 p.m.