fFITs: S3 class of multiple fine curve fittings object.

In phenofit: Extract Remote Sensing Vegetation Phenology

S3 class of multiple fine curve fittings object.

Description

plot curve fitting VI, gradient (first order difference D1), hessian (D2), curvature (k) and the change rate of curvature(der.k)

Usage

## S3 method for class 'fFITs'
plot(x, method, show.pheno = TRUE, ...)

## S3 method for class 'fFIT'
plot(x, data, ...)

Arguments

x	Fine curve fitting object fFITs() returned by curvefit().
method	Which fine curve fitting method to be extracted?
show.pheno	whether to plot phenological metrics.
...	other parameters to curvature().
data	A data.frame with the columns of c('t', 'y')

See Also

curvature()

Examples

library(phenofit)
# simulate vegetation time-series
fFUN = doubleLog.Beck
par  = c( mn  = 0.1 , mx  = 0.7 , sos = 50 , rsp = 0.1 , eos = 250, rau = 0.1)

t    <- seq(1, 365, 8)
tout <- seq(1, 365, 1)
y <- fFUN(par, t)

methods <- c("AG", "Beck", "Elmore", "Gu", "Zhang") # "Klos" too slow
fit <- curvefit(y, t, tout, methods)

# plot
plot(fit)

phenofit documentation built on June 8, 2025, 9:39 p.m.