zero_range {ggvis} | R Documentation |
The machine epsilon is the difference between 1.0 and the next number that can be represented by the machine. By default, this function uses epsilon * 100 as the tolerance. First it scales the values so that they have a mean of 1, and then it checks if the difference between them is larger than the tolerance.
zero_range(x, tol = .Machine$double.eps * 100)
x |
numeric range: vector of length 2 |
tol |
A value specifying the tolerance. Defaults to
|
logical TRUE
if the relative difference of the endpoints of
the range are not distinguishable from 0.
eps <- .Machine$double.eps zero_range(c(1, 1 + eps)) # TRUE zero_range(c(1, 1 + 99 * eps)) # TRUE zero_range(c(1, 1 + 101 * eps)) # FALSE - Crossed the tol threshold zero_range(c(1, 1 + 2 * eps), tol = eps) # FALSE - Changed tol # Scaling up or down all the values has no effect since the values # are rescaled to 1 before checking against tol zero_range(100000 * c(1, 1 + eps)) # TRUE zero_range(100000 * c(1, 1 + 200 * eps)) # FALSE zero_range(.00001 * c(1, 1 + eps)) # TRUE zero_range(.00001 * c(1, 1 + 200 * eps)) # FALSE # NA values zero_range(c(1, NA)) # NA zero_range(c(1, NaN)) # NA # Infinite values zero_range(c(1, Inf)) # FALSE zero_range(c(-Inf, Inf)) # FALSE zero_range(c(Inf, Inf)) # TRUE