Misra1a {NISTnls}R Documentation

Monomolecular Absorption Data

Description

The Misra1a data frame has 14 rows and 2 columns.

Arguments

y A numeric vector of volume values.
x A numeric vector of pressure values.

Format

This data frame contains the following columns:

Details

These data are the result of a NIST study regarding dental research in monomolecular adsorption. The response variable is volume, and the predictor variable is pressure.

Source

Misra, D., NIST (1978). Dental Research Monomolecular Adsorption Study.

Examples

library(NISTnls)
data(Misra1a)
plot(y ~ x, data = Misra1a)
fm1 <- nls(y ~ b1*(1-exp(-b2*x)), data = Misra1a, trace = TRUE,
           start = c(b1 = 500, b2 = 0.0001) )
fm2 <- nls(y ~ b1*(1-exp(-b2*x)), data = Misra1a, trace = TRUE,
           start = c(b1 = 250, b2 = 0.0005) )
fm3 <- nls(y ~ 1-exp(-b2*x), data = Misra1a, trace = TRUE,
           start = c(b2 = 0.0001), algorithm = "plinear" )
fm4 <- nls(y ~ 1-exp(-b2*x), data = Misra1a, trace = TRUE,
           start = c(b2 = 0.0005), algorithm = "plinear" )
## Using a self-starting model
fm5 <- nls(y ~ SSasympOrig(x, Asym, lrc), data = Misra1a)

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