fitexp4: Exponential 4 Model Fit

Description Usage Arguments Details Value Examples

View source: R/fitexp4.R

Description

Function that fits to f(x) = tp*(1-2^(-x/ga)) and returns generic model outputs.

Usage

1
fitexp4(conc, resp, bidirectional = TRUE, verbose = FALSE, nofit = FALSE)

Arguments

conc

Vector of concentration values NOT in log units.

resp

Vector of corresponding responses.

bidirectional

If TRUE, model can be positive or negative; if FALSE, it will be positive only.

verbose

If TRUE, gives optimization and hessian inversion details.

nofit

If nofit = TRUE, returns formatted output filled with missing values.

Details

Zero background and increasing absolute response are assumed. Parameters are "tp" (top), "ga" (AC50), and error term "er". success = 1 for a successful fit, 0 if optimization failed, and NA if nofit = TRUE. cov = 1 for a successful hessian inversion, 0 if it fails, and NA if nofit = TRUE. aic, rme, modl, parameters, and parameter sds are set to NA in case of nofit or failure.

Value

Named list containing: success, aic (Aikaike Information Criteria), cov (success of covariance calculation), rme (root mean square error), modl (vector of model values at given concentrations), parameters values, parameter sd (standard deviation) estimates, pars (vector of parameter names), sds (vector of parameter sd names).

Examples

1
fitexp4(c(.03,.1,.3,1,3,10,30,100), c(0,0,.1, .2, .5, 1, 1.5, 2))

tcplfit2 documentation built on July 14, 2021, 9:06 a.m.