Gauss1 {NISTnls}R Documentation

Generated data

Description

The Gauss1 data frame has 250 rows and 2 columns of generated data.

Arguments

y A numeric vector of generated responses.
x A numeric vector of generated input values.

Format

This data frame contains the following columns:

Details

The data are generated data with two well-separated Gaussians on a decaying exponential baseline plus normally distributed zero-mean noise with variance = 6.25.

Source

Rust, B., NIST (1996).

Examples

library(NISTnls)
data(Gauss1)
plot(y ~ x, data = Gauss1)
fm1 <- nls(y ~ b1*exp( -b2*x ) + b3*exp( -(x-b4)**2 / b5**2 )
               + b6*exp( -(x-b7)**2 / b8**2 ), data = Gauss1, trace = TRUE,
           start = c(b1 = 97.0, b2 = 0.009, b3 = 100.0, b4 = 65.0, b5 = 20.0,
                     b6 = 70.0, b7 = 178., b8 = 16.5))
fm2 <- nls(y ~ b1*exp( -b2*x ) + b3*exp( -(x-b4)**2 / b5**2 )
               + b6*exp( -(x-b7)**2 / b8**2 ), data = Gauss1, trace = TRUE,
           start = c(b1 = 94.0, b2 =  0.0105, b3 = 99.0, b4 = 63.0, b5 = 25.0,
                     b6 = 71.0, b7 = 180.0, b8 = 20.0))
fm3 <- nls(y ~ cbind(exp(-b2*x), exp(-(x-b4)**2/b5**2), exp(-(x-b7)**2/b8**2)),
           data = Gauss1, trace = TRUE,
           start = c( b2 = 0.009, b4 = 65.0, b5 = 20.0, b7 = 178., b8 = 16.5),
           algorithm = "plinear")
fm4 <- nls(y ~ cbind(exp(-b2*x), exp(-(x-b4)**2/b5**2), exp(-(x-b7)**2/b8**2)),
           data = Gauss1, trace = TRUE,
           start = c( b2 = 0.0105, b4 = 63.0, b5 = 25.0, b7 = 180., b8 = 20.0),
           algorithm = "plinear")

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