compute.fb {DTWBI} | R Documentation |
Estimates the Fractional Bias (FB) of two univariate signals Y (imputed values) and X (true values).
compute.fb(Y, X, verbose = F)
Y |
vector of imputed values |
X |
vector of true values |
verbose |
if TRUE, print advice about the quality of the model |
This function returns the value of FB of two vectors corresponding to univariate signals, indicating whether predicted values are underestimated or overestimated compared to true values.
A perfect imputation model gets FB = 0
.
An acceptable imputation model gives FB <= 0.3
.
Both vectors Y and X must be of equal length, on the contrary an error will be displayed.
In both input vectors, eventual NA will be exluded with a warning diplayed.
Camille Dezecache, Hong T. T. Phan, Emilie Poisson-Caillault
data(dataDTWBI)
X <- dataDTWBI[, 1] ; Y <- dataDTWBI[, 2]
compute.fb(Y,X)
compute.fb(Y,X, verbose = TRUE)
# If mean(X)=mean(Y)=0, it is impossible to estimate FB,
# unless both true and imputed values vectors are constant.
# By definition, in this case, FB = 0.
X <- rep(0, 10) ; Y <- rep(0, 10)
compute.fb(Y,X)
# If true and imputed values are not zero and are opposed, FB = Inf.
X <- rep(runif(1), 10)
Y <- -X
compute.fb(Y,X)