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sfsmisc (version 1.1-19)

nr.sign.chg: Number of Sign Changes in Sequence

Description

Compute the number of sign changes in the sequence y.

Usage

nr.sign.chg(y)

Value

an integer giving the number of sign changes in sequence y. Note that going from positive to 0 to positive is not a sign change.

Arguments

y

numeric vector.

Author

Martin Maechler, 17 Feb 1993.

Examples

Run this code
(y <- c(1:2,1:-1,0:-2))
nr.sign.chg(y)## = 1

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