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.
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.
Try <- function(expr) if (!inherits(val <- try(expr), "try-error")) val plot(y ~ x, data = Misra1d) Try(fm1 <- nls(y ~ b1*b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE, start = c(b1 = 500, b2 = 0.0001) )) Try(fm1a <- nls(y ~ b1*b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE, alg = "port", start = c(b1 = 500, b2 = 0.0001) )) Try(fm2 <- nls(y ~ b1*b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE, start = c(b1 = 450, b2 = 0.0003) )) Try(fm2a <- nls(y ~ b1*b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE, alg = "port", start = c(b1 = 450, b2 = 0.0003) )) Try(fm3 <- nls(y ~ b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE, start = c(b2 = 0.0001), algorithm = "plinear" )) Try(fm4 <- nls(y ~ b2*x*((1+b2*x)**(-1)), data = Misra1d, trace = TRUE, start = c(b2 = 0.0005), algorithm = "plinear" ))