https://github.com/JuliaDiffEq/DiffEqFlux.jl
Revision 9af1cd7313fe1b3e7d235bc9f42212961ae93a1e authored by Christopher Rackauckas on 08 April 2020, 18:36:50 UTC, committed by GitHub on 08 April 2020, 18:36:50 UTC
Add QuadDIRECT global optimizer
Tip revision: 9af1cd7313fe1b3e7d235bc9f42212961ae93a1e authored by Christopher Rackauckas on 08 April 2020, 18:36:50 UTC
Merge pull request #220 from ranjanan/RA/quaddirect
Merge pull request #220 from ranjanan/RA/quaddirect
Tip revision: 9af1cd7
neural_de.jl
using OrdinaryDiffEq, StochasticDiffEq, DelayDiffEq, Flux, DiffEqFlux,
Zygote, Test, DiffEqSensitivity
mp = Float32[0.1,0.1]
x = Float32[2.; 0.]
xs = Float32.(hcat([0.; 0.], [1.; 0.], [2.; 0.]))
tspan = (0.0f0,1.0f0)
dudt = Chain(Dense(2,50,tanh),Dense(50,2))
fastdudt = FastChain(FastDense(2,50,tanh),FastDense(50,2))
NeuralODE(dudt,tspan,Tsit5(),save_everystep=false,save_start=false)(x)
NeuralODE(dudt,tspan,Tsit5(),saveat=0.1)(x)
NeuralODE(dudt,tspan,Tsit5(),saveat=0.1,sensealg=TrackerAdjoint())(x)
NeuralODE(dudt,tspan,Tsit5(),save_everystep=false,save_start=false)(xs)
NeuralODE(dudt,tspan,Tsit5(),saveat=0.1)(xs)
NeuralODE(dudt,tspan,Tsit5(),saveat=0.1,sensealg=TrackerAdjoint())(xs)
node = NeuralODE(dudt,tspan,Tsit5(),save_everystep=false,save_start=false)
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node))
@test ! iszero(grads[xs])
@test ! iszero(grads[node.p])
node = NeuralODE(dudt,tspan,Tsit5(),save_everystep=false,save_start=false,sensealg=TrackerAdjoint())
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node))
@test ! iszero(grads[xs])
@test ! iszero(grads[node.p])
node = NeuralODE(dudt,tspan,Tsit5(),save_everystep=false,save_start=false,sensealg=BacksolveAdjoint())
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node))
@test ! iszero(grads[xs])
@test ! iszero(grads[node.p])
## Fast
node = NeuralODE(fastdudt,tspan,Tsit5(),save_everystep=false,save_start=false)
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node))
@test ! iszero(grads[xs])
@test ! iszero(grads[node.p])
node = NeuralODE(fastdudt,tspan,Tsit5(),save_everystep=false,save_start=false,sensealg=TrackerAdjoint())
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node))
@test ! iszero(grads[xs])
@test ! iszero(grads[node.p])
node = NeuralODE(fastdudt,tspan,Tsit5(),save_everystep=false,save_start=false,sensealg=BacksolveAdjoint())
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
@test_broken grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node)) isa Tuple
#@test ! iszero(grads[xs])
#@test ! iszero(grads[node.p])
# Adjoint
@testset "adjoint mode" begin
node = NeuralODE(dudt,tspan,Tsit5(),save_everystep=false,save_start=false)
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node))
@test ! iszero(grads[xs])
@test ! iszero(grads[node.p])
node = NeuralODE(dudt,tspan,Tsit5(),saveat=0.0:0.1:1.0)
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node))
@test ! iszero(grads[xs])
@test ! iszero(grads[node.p])
node = NeuralODE(dudt,tspan,Tsit5(),saveat=0.1)
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node))
@test ! iszero(grads[xs])
@test ! iszero(grads[node.p])
node = NeuralODE(fastdudt,tspan,Tsit5(),save_everystep=false,save_start=false)
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
@test_broken grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node)) isa Tuple
#@test ! iszero(grads[xs])
#@test ! iszero(grads[node.p])
node = NeuralODE(fastdudt,tspan,Tsit5(),saveat=0.0:0.1:1.0)
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
@test_broken grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node)) isa Tuple
#@test ! iszero(grads[xs])
#@test ! iszero(grads[node.p])
node = NeuralODE(fastdudt,tspan,Tsit5(),saveat=0.1)
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
@test_broken grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node)) isa Tuple
#@test ! iszero(grads[xs])
#@test ! iszero(grads[node.p])
end
# RD
@testset "Tracker mode" begin
node = NeuralODE(dudt,tspan,Tsit5(),save_everystep=false,save_start=false,sensealg=TrackerAdjoint())
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node))
@test ! iszero(grads[xs])
@test ! iszero(grads[node.p])
NeuralODE(dudt,tspan,Tsit5(),saveat=0.0:0.1:1.0,sensealg=TrackerAdjoint())
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node))
@test ! iszero(grads[xs])
@test ! iszero(grads[node.p])
node = NeuralODE(dudt,tspan,Tsit5(),saveat=0.1,sensealg=TrackerAdjoint())
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node))
@test ! iszero(grads[xs])
@test ! iszero(grads[node.p])
node = NeuralODE(fastdudt,tspan,Tsit5(),save_everystep=false,save_start=false,sensealg=TrackerAdjoint())
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
@test_broken grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node)) isa Tuple
#@test ! iszero(grads[xs])
#@test ! iszero(grads[node.p])
NeuralODE(fastdudt,tspan,Tsit5(),saveat=0.0:0.1:1.0,sensealg=TrackerAdjoint())
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
@test_broken grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node)) isa Tuple
#@test ! iszero(grads[xs])
#@test ! iszero(grads[node.p])
node = NeuralODE(fastdudt,tspan,Tsit5(),saveat=0.1,sensealg=TrackerAdjoint())
grads = Zygote.gradient(()->sum(node(x)),Flux.params(x,node))
@test ! iszero(grads[x])
@test ! iszero(grads[node.p])
@test_broken grads = Zygote.gradient(()->sum(node(xs)),Flux.params(xs,node)) isa Tuple
#@test ! iszero(grads[xs])
#@test ! iszero(grads[node.p])
end
dudt2 = Chain(Dense(2,50,tanh),Dense(50,2))
fastdudt2 = FastChain(FastDense(2,50,tanh),FastDense(50,2))
NeuralDSDE(dudt,dudt2,(0.0f0,.1f0),SOSRI(),saveat=0.1)(x)
sode = NeuralDSDE(dudt,dudt2,(0.0f0,.1f0),SOSRI(),saveat=0.0:0.01:0.1)
grads = Zygote.gradient(()->sum(sode(x)),Flux.params(x,sode))
@test ! iszero(grads[x])
@test ! iszero(grads[sode.p])
@test ! iszero(grads[sode.p][end])
grads = Zygote.gradient(()->sum(sode(xs)),Flux.params(xs,sode))
@test ! iszero(grads[xs])
@test ! iszero(grads[sode.p])
@test ! iszero(grads[sode.p][end])
sode = NeuralDSDE(fastdudt,fastdudt2,(0.0f0,.1f0),SOSRI(),saveat=0.0:0.01:0.1)
grads = Zygote.gradient(()->sum(sode(x)),Flux.params(x,sode))
@test ! iszero(grads[x])
@test ! iszero(grads[sode.p])
@test ! iszero(grads[sode.p][end])
@test_broken grads = Zygote.gradient(()->sum(sode(xs)),Flux.params(xs,sode)) isa Tuple
#@test ! iszero(grads[xs])
#@test ! iszero(grads[sode.p])
#@test ! iszero(grads[sode.p][end])
dudt22 = Chain(Dense(2,50,tanh),Dense(50,4),x->reshape(x,2,2))
fastdudt22 = FastChain(FastDense(2,50,tanh),FastDense(50,4),(x,p)->reshape(x,2,2))
NeuralSDE(dudt,dudt22,(0.0f0,.1f0),2,LambaEM(),saveat=0.01)(x)
sode = NeuralSDE(dudt,dudt22,(0.0f0,0.1f0),2,LambaEM(),saveat=0.0:0.01:0.1)
grads = Zygote.gradient(()->sum(sode(x)),Flux.params(x,sode))
@test ! iszero(grads[x])
@test ! iszero(grads[sode.p])
@test ! iszero(grads[sode.p][end])
@test_broken grads = Zygote.gradient(()->sum(sode(xs)),Flux.params(xs,sode))
#@test ! iszero(grads[xs])
#@test ! iszero(grads[sode.p])
#@test ! iszero(grads[sode.p][end])
sode = NeuralSDE(fastdudt,fastdudt22,(0.0f0,0.1f0),2,LambaEM(),saveat=0.0:0.01:0.1)
grads = Zygote.gradient(()->sum(sode(x)),Flux.params(x,sode))
@test ! iszero(grads[x])
@test ! iszero(grads[sode.p])
@test ! iszero(grads[sode.p][end])
@test_broken grads = Zygote.gradient(()->sum(sode(xs)),Flux.params(xs,sode))
#@test ! iszero(grads[xs])
#@test ! iszero(grads[sode.p])
#@test ! iszero(grads[sode.p][end])
ddudt = Chain(Dense(6,50,tanh),Dense(50,2))
NeuralCDDE(ddudt,(0.0f0,2.0f0),(p,t)->zero(x),(1f-1,2f-1),MethodOfSteps(Tsit5()),saveat=0.1)(x)
dode = NeuralCDDE(ddudt,(0.0f0,2.0f0),(p,t)->zero(x),(1f-1,2f-1),MethodOfSteps(Tsit5()),saveat=0.0:0.1:2.0)
grads = Zygote.gradient(()->sum(dode(x)),Flux.params(x,dode))
@test ! iszero(grads[x])
@test ! iszero(grads[dode.p])
@test_broken grads = Zygote.gradient(()->sum(dode(xs)),Flux.params(xs,dode)) isa Tuple
#@test ! iszero(grads[xs])
#@test ! iszero(grads[dode.p])
fastddudt = FastChain(FastDense(6,50,tanh),FastDense(50,2))
NeuralCDDE(fastddudt,(0.0f0,2.0f0),(p,t)->zero(x),(1f-1,2f-1),MethodOfSteps(Tsit5()),saveat=0.1)(x)
dode = NeuralCDDE(fastddudt,(0.0f0,2.0f0),(p,t)->zero(x),(1f-1,2f-1),MethodOfSteps(Tsit5()),saveat=0.0:0.1:2.0)
grads = Zygote.gradient(()->sum(dode(x)),Flux.params(x,dode))
@test ! iszero(grads[x])
@test ! iszero(grads[dode.p])
@test_broken grads = Zygote.gradient(()->sum(dode(xs)),Flux.params(xs,dode)) isa Tuple
#@test ! iszero(grads[xs])
#@test ! iszero(grads[dode.p])
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