Skip to content

Override SpecialFunctions #65

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
mlubin merged 6 commits into from
Sep 4, 2018
Merged

Override SpecialFunctions #65

Show file tree
Hide file tree
Changes from 1 commit
Commits
Show all changes
6 commits
Select commit Hold shift + click to select a range
85d3ad1
Add flipsign
dlfivefifty Dec 16, 2016
642388f
Fix bug in inv(::Dual)
dlfivefifty Dec 16, 2016
41b2245
Override SpecialFunctions
dlfivefifty Aug 17, 2018
e9efb40
Fix deprecations
femtocleaner[bot] Sep 3, 2018
3c3df59
REQUIRE Julia v0.7
dlfivefifty Sep 3, 2018
13792a4
Merge pull request #1 from dlfivefifty/fbot/deps
dlfivefifty Sep 3, 2018
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
Next Next commit
Add flipsign
  • Loading branch information
@dlfivefifty
dlfivefifty committed Dec 16, 2016
commit 85d3ad1906e1c33a008abd8097b441a0aef7936e
4 changes: 4 additions & 0 deletions src/dual.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -203,6 +203,10 @@ abs{T<:Real}(z::Dual{T}) = z ≥ 0 ? z : -z
angle{T<:Real}(z::Dual{T}) = z ≥ 0 ? zero(z) : one(z)*π
angle{T<:Real}(z::Dual{Complex{T}}) = z == 0 ? (imag(epsilon(z)) == 0 ? Dual(zero(T),zero(T)) : Dual(zero(T),convert(T, Inf))) : real(log(sign(z))/im)

flipsign(x::Dual,y::Dual) = y == 0 ? flipsign(x, epsilon(y)) : flipsign(x, value(y))
flipsign(x, y::Dual) = y == 0 ? flipsign(x, epsilon(y)) : flipsign(x, value(y))
flipsign(x::Dual, y) = dual(flipsign(value(x), y), flipsign(epsilon(x), y))

# algebraic definitions
conjdual(z::Dual) = Dual(value(z),-epsilon(z))
absdual(z::Dual) = abs(value(z))
Expand Down
8 changes: 8 additions & 0 deletions test/automatic_differentiation_test.jl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -139,3 +139,11 @@ test(x, y) = x^2 + y

@test epsilon(Dual(-2.0,1.0)^2.0) == -4
@test epsilon(Dual(-2.0,1.0)^Dual(2.0,0.0)) == -4


# test for flipsign
flipsign(Dual(1.0,1.0),2.0) == Dual(1.0,1.0)
flipsign(Dual(1.0,1.0),-2.0) == Dual(-1.0,-1.0)
flipsign(Dual(1.0,1.0),Dual(1.0,1.0)) == Dual(1.0,1.0)
flipsign(Dual(1.0,1.0),Dual(0.0,-1.0)) == Dual(-1.0,-1.0)
flipsign(-1.0,Dual(1.0,1.0)) == -1.0