piecewise_x {IBMPopSim} | R Documentation |
Piecewise real function.
Description
Given the vectors (breaks[1],...,breaks[n])
and the list of IBMPopSim
compatible
functions funs = (f[0],f[1],...,f[n])
(one value more!), piecewise_x(breaks, funs)
returns
the function
f(x) = f_0(x){1}_{x\le breaks[1]}+\sum_{k=1}^{n-1} f_k(x) {1}_{[breaks_{k}, breaks_{k+1})}(x) + f_n(x){1}_{x \ge breaks[n]}
Usage
piecewise_x(breaks, funs)
Arguments
breaks |
Numeric vector giving the breaks of functions given in |
funs |
List of functions. |
Details
A C++ version of this function is available. See vignette('IBMPopSim_cpp')
for more details.
Value
Piecewise function built with the given intervals and functions.
Examples
dr <- with(EW_pop_14$rates,
stepfun(x=death_male[,"age"], y=c(0,death_male[,"value"])))
# before age 80 the stepfun and after age 80 the gompertz function
f <- piecewise_x(80, list(dr, gompertz(0.00006, 0.085)))
x <- seq(40:120)
plot(x, sapply(x, f))
[Package IBMPopSim version 1.0.0 Index]