Misra1d {NISTnls} | R Documentation |
The Misra1d
data frame has 14 rows and 2 columns.
This is the same data as Misra1a
but a different model is fit.
y |
A numeric vector of volume values. |
x |
A numeric vector of pressure values. |
This data frame contains the following columns:
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.
Misra, D., NIST (1978). Dental Research Monomolecular Adsorption Study.
library(NISTnls) data(Misra1d) plot(y ~ x, data = Misra1d) fm1 <- nls(y ~ b1*b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE, start = c(b1 = 500, b2 = 0.0001) ) fm2 <- nls(y ~ b1*b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE, start = c(b1 = 450, b2 = 0.0003) ) fm3 <- nls(y ~ b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE, start = c(b2 = 0.0001), algorithm = "plinear" ) fm4 <- nls(y ~ b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE, start = c(b2 = 0.0005), algorithm = "plinear" )