Description Usage Arguments Details Author(s) References See Also Examples

View source: R/MortSmooth_tpower.R

This is an internal function of package `MortalitySmooth`

which
constructs a truncated *p*-th power function along an abscissa
within the function `MortSmooth_bbase`

1 | ```
MortSmooth_tpower(x, t, p)
``` |

`x` |
vector for the abscissa of data. |

`t` |
vector of truncation points. |

`p` |
degree of the power. |

Internal function used in `MortSmooth_bbase`

. The vector
`t`

contains the knots. The simplest system of truncated power
functions uses `p = 0`

and it consists of step functions with
jumps of size 1 at the truncation points `t`

.

Carlo G Camarda

Eilers P. H. C. and B. D. Marx (2010). Splines, Knots, and
Penalties. *Wiley Interdisciplinary Reviews: Computational
Statistics*. 2, 637-653.

1 2 3 4 5 6 7 8 9 | ```
x <- seq(0,1,length=100)
f1 <- MortSmooth_tpower(x=x, t=0.1, p=3)
f2 <- MortSmooth_tpower(x=x, t=0.2, p=3)
f3 <- MortSmooth_tpower(x=x, t=0.3, p=3)
## Truncated 3rd power functions equally-spaced
plot(x, f1, t="l",
main="Truncated 3rd power functions equally-spaced")
lines(x, f2, col=2)
lines(x, f3, col=3)
``` |

MortalitySmooth documentation built on May 29, 2017, 7:11 p.m.

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