nzp.Rout.save
R version 3.3.2 (2016-10-31) -- "Sincere Pumpkin Patch"
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>
> library(aster)
Loading required package: trust
>
> do.chisq.test <- function(x, mu, max.bin) {
+ stopifnot(all(x >= 0))
+ xx <- seq(1, max.bin)
+ yy <- dpois(xx, mu)
+ yy[length(yy)] <- ppois(max.bin - 1, mu, lower.tail = FALSE)
+ pp <- yy / sum(yy)
+ ecc <- length(x) * pp
+ if (any(ecc < 5.0))
+ warning("violates rule of thumb about > 5 expected in each cell")
+ cc <- tabulate(x, max.bin)
+ chisqstat <- sum((cc - ecc)^2 / ecc)
+ pval <- pchisq(chisqstat, length(ecc) - 1, lower.tail = FALSE)
+ list(chisqstat = chisqstat, df = length(ecc) - 1, pval = pval,
+ observed = cc, expected = ecc, x = xx)
+ }
>
> set.seed(42)
> nsim <- 1e4
>
> mu <- 2.0
> x <- rnzp(nsim, mu)
> chisqout1 <- do.chisq.test(x, mu, 8)
>
> mu <- 1.0
> x <- rnzp(nsim, mu)
> chisqout2 <- do.chisq.test(x, mu, 5)
>
> mu <- 0.5
> x <- rnzp(nsim, mu)
> chisqout3 <- do.chisq.test(x, mu, 4)
>
> nsim <- 1e6
> mu <- 0.05
> x <- rnzp(nsim, mu)
> chisqout4 <- do.chisq.test(x, mu, 4)
>
> # nsim <- 1e7
> # mu <- 0.005
> # x <- rnzp(nsim, mu)
> # do.chisq.test(x, mu, 3)
>
> mu <- 0.5
> xpred <- 0:10
> save.seed <- .Random.seed
> x <- rnzp(xpred, mu, xpred)
> .Random.seed <- save.seed
> my.x <- rep(0, length(xpred))
> for (i in seq(along = xpred))
+ if (xpred[i] > 0)
+ for (j in 1:xpred[i])
+ my.x[i] <- my.x[i] + rnzp(1, mu)
> all.equal(x, my.x)
[1] TRUE
>
> foo <- new.env(parent = emptyenv())
> bar <- suppressWarnings(try(load("nzp.rda", foo), silent = TRUE))
> if (inherits(bar, "try-error")) {
+ save(list = paste("chisqout", 1:4, sep = ""), file = "nzp.rda")
+ } else {
+ print(all.equal(chisqout1, foo$chisqout1))
+ print(all.equal(chisqout2, foo$chisqout2))
+ print(all.equal(chisqout3, foo$chisqout3))
+ print(all.equal(chisqout4, foo$chisqout4))
+ }
[1] TRUE
[1] TRUE
[1] TRUE
[1] TRUE
>
>
> proc.time()
user system elapsed
0.196 0.012 0.197