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Add complex randn #21973

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merged 5 commits into from
May 25, 2017
Merged

Add complex randn #21973

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d891aef
Add complex randn
May 19, 2017
2da70cc
add where syntax and move to appropriate place in source
May 20, 2017
e21065f
update NEWS.md and adjust complex randn to accept AbstractFloat
May 23, 2017
f3c46e2
minor formatting of complex randn and delete stray empty line
May 24, 2017
672c01b
rebase off of upstream to resolve NEWS conflict
May 25, 2017
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7 changes: 4 additions & 3 deletions base/random.jl
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Original file line number Diff line number Diff line change
Expand Up @@ -1196,9 +1196,6 @@ complex normal distribution.
end
end

Base.@irrational SQRT_HALF 0.7071067811865475244008 sqrt(big(0.5))
randn{T}(rng::AbstractRNG, ::Type{Complex{T}}) = Complex{T}(SQRT_HALF * randn(rng, T), SQRT_HALF*randn(rng, T))

# this unlikely branch is put in a separate function for better efficiency
function randn_unlikely(rng, idx, rabs, x)
@inbounds if idx == 0
Expand Down Expand Up @@ -1287,6 +1284,10 @@ let Floats = Union{Float16,Float32,Float64}
$randfun( dims::Integer... ) = $randfun(GLOBAL_RNG, Float64, dims...)
end
end

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blank line inserted?

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oops, not sure how that got there..

# complex randn
Base.@irrational SQRT_HALF 0.7071067811865475244008 sqrt(big(0.5))
randn(rng::AbstractRNG, ::Type{Complex{T}}) where {T <: Floats} = Complex{T}(SQRT_HALF * randn(rng, T), SQRT_HALF*randn(rng, T))
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@rfourquet rfourquet May 23, 2017 •
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I'm not sure if we want T<:Floats or T<:AbstractFloat. E.g. if someone defines randn(::CustomRNG, ::BigFloat), she won't benefit from your complex randn definition...

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Should be AbstractFloat

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Done, also added a statement to the NEWS

end

## random UUID generation
Expand Down