R Under development (unstable) (2023-12-09 r85665 ucrt) -- "Unsuffered Consequences"
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> library(grDevices, pos = "package:base", verbose = FALSE)
> library(    stats, pos = "package:base", verbose = FALSE)
> library(    utils, pos = "package:base", verbose = FALSE)
> 
> library(fastbeta)
> options(warn = 2L, error = if (interactive()) recover)
> 
> data(sir.e01, package = "fastbeta")
> a <- attributes(sir.e01)
> 
> series <- cbind(sir.e01[, c("Z", "B")], mu = a[["mu"]](0))
> colnames(series) <- c("Z", "B", "mu")
> constants <- c(S0 = sir.e01[1L, "S"],
+                I0 = sir.e01[1L, "I"],
+                R0 = sir.e01[1L, "R"],
+                gamma = a[["gamma"]],
+                delta = a[["delta"]])
> 
> a <- 8; b <- 216
> str(L0 <- ptpi(series, constants, a = a, b = b, complete = FALSE))
List of 4
 $ value: Named num [1:3] 51892 4068 944040
  ..- attr(*, "names")= chr [1:3] "S" "I" "R"
 $ delta: num 0.000887
 $ iter : int 5
 $ X    : NULL
> str(L1 <- ptpi(series, constants, a = a, b = b, complete =  TRUE))
List of 4
 $ value: Named num [1:3] 51892 4068 944040
  ..- attr(*, "names")= chr [1:3] "S" "I" "R"
 $ delta: num 0.000887
 $ iter : int 5
 $ X    : Time-Series [1:209, 1:3, 1:5] from 8 to 216: 56583 55428 54337 53339 52455 ...
  ..- attr(*, "dimnames")=List of 3
  .. ..$ : NULL
  .. ..$ : chr [1:3] "S" "I" "R"
  .. ..$ : NULL
> 
> stopifnot(exprs = {
+ 	is.list(L0)
+ 	length(L0) == 4L
+ 	identical(names(L0), c("value", "delta", "iter", "X"))
+ 	is.list(L1)
+ 	length(L1) == length(L0)
+ 	identical(names(L1), names(L0))
+ 	identical(L0[-4L], L1[-4L])
+ 	is.null(L0[[4L]])
+ })
> 
> value <- L1[["value"]]
> stopifnot(exprs = {
+ 	is.double(value)
+ 	length(value) == 3L
+ 	identical(names(value), c("S", "I", "R"))
+ 	is.finite(value)
+ 	value >= 0
+ })
> 
> delta <- L1[["delta"]]
> stopifnot(exprs = {
+ 	is.double(delta)
+ 	length(delta) == 1L
+ 	is.finite(delta)
+ })
> 
> iter <- L1[["iter"]]
> stopifnot(exprs = {
+ 	is.integer(iter)
+ 	length(iter) == 1L
+ 	!is.na(iter)
+ 	iter >= 1L
+ })
> 
> X <- L1[["X"]]
> stopifnot(exprs = {
+ 	is.double(X)
+ 	is.ts(X) && inherits(X, "mts") # is.mts checks is.matrix
+ 	identical(dim(X), c(as.integer(b - a + 1), 3L, iter))
+ 	identical(dimnames(X), list(NULL, c("S", "I", "R"), NULL))
+ 	is.finite(X)
+ 	X >= 0
+ })
> 
> if (dev.interactive(TRUE))
+ 	plot(X[, "S", ])
> 
> proc.time()
   user  system elapsed 
   0.17    0.07    0.23 
> 
> proc.time()
   user  system elapsed 
   0.17    0.07    0.23