expression as a parameter of binom.test (PR#9288)

On Wed, 11 Oct 2006 savicky at cs.cas.cz wrote:

Full_Name: Petr Savicky
Version: 2.4.0
OS: Fedora Core release 2
Submission from: (NULL) (62.24.91.47)


the error is

binom.test(0.56*10000,10000)

Error in binom.test(0.56 * 10000, 10000) :
        'x' must be nonnegative and integer

Well, do:

binom.test(as.integer(0.56*10000),10000)

then.

storage.mode(0.56*10000)

is "double", not "integer". Footnote 9 in "An Introduction to R", and in
the table early in Chapter 2 in "R Language Definition". In fact it is
another rendition of FAQ 7.31 (is anybody logging a time series of 7.31?):

x <- 0.56*10000
x1 <- 5600
all.equal(x, x1)
identical(x, x1)

and fails:

x != round(x)

in binom.test; it passes:

!isTRUE(all.equal(x, round(x)))

which might be more graceful.

while

binom.test(5600,10000)

yields correct result.

The same error occurrs for

binom.test(0.57*10000,10000)