Fix vignette "Plugging in new calibration algorithms in airGR"
The starting points used for the multi-start approach are in the real space, while they should be in the transformed space.
startGR4J <- expand.grid(data.frame(CalibOptions$StartParamDistrib))
should be replaced by
StartParamDistrib <- matrix(c(+5.13, -1.60, +3.03, -9.05, +5.51, -0.61, +3.74, -8.51, +6.07, -0.02, +4.42, -8.06), ncol = 4, byrow = TRUE) startGR4J <- expand.grid(data.frame(StartParamDistrib))
or perhaps, by a more diverse list of starting points sampled in the transformed space if we want to find local optima.