bamlss (version 1.2-1)

smooth.construct.ms.smooth.spec: Smooth constructor for monotonic P-splines

Description

The function sets up a smooth term for shape constraint estimation of P-spline model terms. Note that this currently only works using boosting and backfitting.

Usage

# S3 method for ms.smooth.spec
smooth.construct(object, data, knots, ...)

Value

See function see smooth.construct.

Arguments

object

Either a smooth specification object, or object of class "bamlss", "bamlss.frame", "bamlss.formula" or "bamlss.terms". For smooth specification objects, see function smooth.construct.

data

A data frame or list, see also see function smooth.construct.

knots

See function smooth.construct.

...

Arguments passed to the smooth term constructor functions.

See Also

bamlss.frame, bamlss.formula, bamlss, smooth.construct.

Examples

if (FALSE) ## Generate some data.
set.seed(123)

n <- 300
x <- runif(n, -2, 3)
y <- sin(x) + rnorm(n, sd = 0.1)

## Increasing: constr = 1.
## Decreasing: constr = 2.
b <- bamlss(y ~ s2(x,bs="ms",xt=list(constr=1)),
  data = d, sampler = FALSE, optimizer = opt_bfit)

## Predict and plot.
p <- predict(b, model = "mu")
plot(y ~ x)
plot2d(p ~ x, add = TRUE, col.lines = 4, lwd = 2)