| Misra1b {NISTnls} | R Documentation |
The Misra1b data frame has 14 rows and 2 columns.
It 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(Misra1b)
plot(y ~ x, data = Misra1b)
fm1 <- nls(y ~ b1 * (1-(1+b2*x/2)**(-2)), data = Misra1b, trace = TRUE,
start = c(b1 = 500, b2 = 0.0001) )
fm2 <- nls(y ~ b1 * (1-(1+b2*x/2)**(-2)), data = Misra1b, trace = TRUE,
start = c(b1 = 300, b2 = 0.0002) )
fm3 <- nls(y ~ 1-(1+b2*x/2)**(-2), data = Misra1b, trace = TRUE,
start = c(b2 = 0.0001), algorithm = "plinear" )
fm4 <- nls(y ~ 1-(1+b2*x/2)**(-2), data = Misra1b, trace = TRUE,
start = c(b2 = 0.0005), algorithm = "plinear" )