Phenology extraction in Derivative method (DER)

Source: R/PhenoDeriv.R

Phenology extraction in Derivative method (DER)

PhenoDeriv(x, t, ...)

# S3 method for class 'fFIT'
PhenoDeriv(x, t = NULL, analytical = FALSE, smoothed.spline = FALSE, ...)

# Default S3 method
PhenoDeriv(x, t, der1, IsPlot = TRUE, show.legend = TRUE, ...)

Arguments

x

numeric vector, or fFIT object returned by curvefit().

t

doy vector, corresponding doy of vegetation index.

...

Other parameters will be ignored.

analytical

If true, numDeriv package grad and hess will be used; if false, D1 and D2 will be used.

smoothed.spline

Whether apply smooth.spline first?

der1

the first order difference

IsPlot

whether to plot?

show.legend

whether show figure lelend?

References

  1. Filippa, G., Cremonese, E., Migliavacca, M., Galvagno, M., Forkel, M., Wingate, L., … Richardson, A. D. (2016). Phenopix: A R package for image-based vegetation phenology. Agricultural and Forest Meteorology, 220, 141–150. doi:10.1016/j.agrformet.2016.01.006