| 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.
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" )