Instantaneous Rate of Green Up

Fits a double logistic function to NDVI time series and calculates instantaneous rate of green (IRG) according to methods described in Bischoff et al. (2012) .


v 0.1.1 (2019-02-13)

  • fixed data.table recycling change (#23)
  • minor edits to 'Getting Started' vignette

v 0.1.0 (2019-01-04)

Initial release

One vignette ('Getting started with irg') and:

Five filtering functions:

  • filter_qa
  • filter_winter
  • filter_roll
  • filter_top

Two scaling functions:

  • scale_doy
  • scale_ndvi

Three modeling functions:

  • model_start
  • model_params
  • model_ndvi

One instantaneous rate of green-up function:

  • calc_irg

Two meta functions:

  • filter_ndvi
  • irg

Reference manual

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0.1.1 by Alec L. Robitaille, a year ago

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Browse source code at

Authors: Alec L. Robitaille [aut, cre]

Documentation:   PDF Manual  

GPL-3 license

Imports data.table, RcppRoll, stats

Suggests testthat, knitr, rmarkdown, DiagrammeR, ggplot2

See at CRAN