remove range, midrange. closes JuliaLang#57

LilithHafner · Apr 26, 2014 · 9d7c7bc · 9d7c7bc
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diff --git a/docs/source/scalarstats.rst b/docs/source/scalarstats.rst
@@ -38,14 +38,6 @@ Measurements of Variation
 
   Compute the middle between ``a`` and ``b``, *i.e.* ``(a + b) / 2``.
 
-- **midrange** (x)
-
-  Compute the middle between ``minimum(x)`` and ``maximum(x)``.  
-
-- **range** (x)
-
-  Compute the difference between ``maximum(x)`` and ``minimum(x)``.
-
 
 Quantile and Friends
 ---------------------

diff --git a/src/StatsBase.jl b/src/StatsBase.jl
@@ -21,8 +21,6 @@ module StatsBase
     sem,        # standard error of the mean, i.e. sqrt(var / n)
     mad,        # median absolute deviation
     middle,     # the mean of two real numbers
-    midrange,   # the mean of minimum and maximum
-    range,      # the difference between maximum and minimum
     percentile, # quantile using percentage (instead of fraction) as argument
     iqr,        # interquatile range 
     nquantile,  # quantiles at [0:n]/n

diff --git a/src/scalarstats.jl b/src/scalarstats.jl
@@ -130,12 +130,6 @@ mad{T<:Real}(v::Range1{T}) = mad!([v])
 middle{T<:FloatingPoint}(a1::T, a2::T) = (a1 + a2) / convert(T, 2)
 middle{T<:Integer}(a1::T, a2::T) = (a1 + a2) / 2
 
-# Mid-range
-midrange{T<:Real}(a::AbstractArray{T}) = middle(extrema(a)...)
-
-# Range: xmax - xmin
-range{T<:Real}(a::AbstractArray{T}) = ((m0, m1) = extrema(a); m1 - m0)
-
 
 #############################
 #

diff --git a/test/scalarstats.jl b/test/scalarstats.jl
@@ -28,18 +28,6 @@ wv = weights(ones(5) * 2.0)
 @test_approx_eq mad([1:5]) 1.4826
 @test_approx_eq mad(1:5) 1.4826
 
-# min/max related
-
-@test_approx_eq midrange([1, 2, 3, 4, 5]) 3.0
-@test_approx_eq midrange([1, 2, 2, 2, 5]) 3.0
-@test_approx_eq midrange([1, 4, 4, 4, 5]) 3.0
-@test_approx_eq midrange([1:5]) 3.0
-
-@test_approx_eq range([1, 2, 3, 4, 5]) 4.0
-@test_approx_eq range([1, 2, 2, 2, 5]) 4.0
-@test_approx_eq range([1, 4, 4, 4, 5]) 4.0
-@test_approx_eq range([1:15]) 14.0
-
 # quantile & friends
 
 @test_approx_eq quantile(1:5) [1:5]