midpoint {elliplot}

Center of Indexes

Description

Divide a given range of index into two of exact halves.

Usage

midpoint(x)

Arguments

x

range of index. c(min.index, max.index)

Details

This function implements the concept of median, and is used in the midpoints to calculate quantiles.

Value

A list of two numeric vectors is returned.

[[1]]

a range of index for the lower half

[[2]]

a range of index for the higher half

Lengths of the two halves are exactly same. If the parent range has an odd length, the exact center index is used both at the end of the lower half and at the start of the higher half.

Author(s)

Shinichiro Tomizono

References

Quantiles: median, quartiles, octiles, hexadeciles, ... https://tomizonor.wordpress.com/2013/04/28/quantiles-octiles/

See Also

midpoints, median, range.

Examples

midpoint(c(2,8))
# results are shown below.
# [[1]]
# [1] 2 5
# 
# [[2]]
# [1] 5 8

midpoint(c(2,9))
# results are shown below.
# [[1]]
# [1] 2 5
# 
# [[2]]
# [1] 6 9