| allequal | R Documentation | 
Determine nearly-equal elements and extract non-nearly-equal elements in a double vector.
unique_allequal(x, ...)
duplicated_allequal(x, ...)
| x | double vector | 
| ... | additional parameters of function  | 
Function duplicated_allequal() returns a logical vector of the same length as the input vector,
indicating whether each element is nearly-equal to any of the previous elements.
Function unique_allequal() returns the non-nearly-equal elements in the input vector.
duplicated.default unique.default
(x = c(.3, 1-.7, 0, .Machine$double.eps))
duplicated.default(x) # not desired
unique.default(x) # not desired
duplicated_allequal(x)
unique_allequal(x)
unique_allequal(x, tol = .Machine$double.eps/2)
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