convertParameters {SCEM}

Parameter estimates from a nonlinear lest squares (NLS) fit.

Description

This function converts the estimated parameters from the non-linear least squares (NLS) model fit to the appropriate parameter space corresponding to the cosine model proposed by Balasse et al (2012).

Usage

convertParameters(curve)

Arguments

curve

A fitted model object from nls function. The fitted model should have the following parameter estimates - amplitude, intercept, frequency, phase.

Value

A list containing the following components:

amplitude

estimated amplitude

intercept

estimated intercept

x0

delay of the data

X

period of the data

birth

birth seasonality estimate

Examples

armenia_split = split(armenia,f = armenia$ID)
curve = sineFit(armenia_split[[1]],method = "OLS")
convertParameters(curve)