Missing functions in Zygote

New to Julia
,
1

I am trying to use the jacobian functions in Zygote, but I can’t find them. In what has to be the dumbest questions ever posted here, there’s very little in Zygote for me. Heres the problem:

julia> using Zygote

julia> names(Zygote)

5-element Array{Symbol,1}:

Symbol(“@code_grad”)

:Params

:Zygote

:gradient

:pullback

julia> Zygote.withjacobian

ERROR: UndefVarError: withjacobian not defined

Stacktrace:

[1] getproperty( ::Module, ::Symbol ) at ./Base.jl:26

[2] top-level scope at REPL[3]:1

Here the Zygote API: Utilities · Zygote

Where are the missing methods?

2

If I had to guess, you have a old version of Zygote installed. Anything under 0.6.20 or even 0.6.30 will probably not have those functions.

3

I got this on updating

(@v1.5) pkg> update Zygote

Updating registry at ~/.julia/registries/General

######################################################################## 100.0%

Installed StatsFuns ─ v0.9.15

No Changes to ~/.julia/environments/v1.5/Project.toml

Updating ~/.julia/environments/v1.5/Manifest.toml

[4c63d2b9] ↑ StatsFuns v0.9.14 ⇒ v0.9.15

julia> using Zygote

julia> names(Zygote)

5-element Array{Symbol,1}:

Symbol(“@code_grad”)

:Params

:Zygote

:gradient

:pullback

julia> Zygote.jacobian

ERROR: UndefVarError: jacobian not defined

Stacktrace:

[1] getproperty( ::Module, ::Symbol ) at ./Base.jl:26

[2] top-level scope at REPL[6]:1

4

What is the output if you enter:

pkg> st

?

5

[e88e6eb3] Zygote v0.4.20

which clearly is not the version I need for the functions (didnt know about st, thank you so much!).
Let me try updating Julia and seeing if “update Zygote” actually bumps up the version.

6

It is more likely that some other package you have installed is holding Zygote back rather than the Julia executable being too old. Try updating all packages first:

pkg> up

If that doesn’t work, ask for the specific Zygote version you want and hopefully you will get an error describing the package that is holding it back:

pkg> add Zygote@0.6.34
7

I update Julia and it solved the problem (thanks everyone) - but to answer @contradict I went back to 1.5, did up and then add Zygote@0.6.34 and got this

ERROR: Unsatisfiable requirements detected for package Distributions [31c24e10]:
Distributions [31c24e10] log:
├─possible versions are: [0.16.0-0.16.4, 0.17.0, 0.18.0, 0.19.1-0.19.2, 0.20.0, 0.21.0-0.21.3, 0.21.5-0.21.12, 0.22.0-0.22.6, 0.23.0-0.23.12, 0.24.0-0.24.18, 0.25.0-0.25.41] or uninstalled
├─restricted to versions 0.18-0.25 by CircStats [0643c194], leaving only versions [0.18.0, 0.19.1-0.19.2, 0.20.0, 0.21.0-0.21.3, 0.21.5-0.21.12, 0.22.0-0.22.6, 0.23.0-0.23.12, 0.24.0-0.24.18, 0.25.0-0.25.41]
│ └─CircStats [0643c194] log:
│ ├─possible versions are: 0.2.1 or uninstalled
│ └─CircStats [0643c194] is fixed to version 0.2.1
├─restricted by compatibility requirements with VectorizedRoutines [0e69188a] to versions: [0.16.0-0.16.4, 0.17.0, 0.18.0, 0.19.1-0.19.2, 0.20.0, 0.21.0-0.21.3, 0.21.5-0.21.12, 0.22.0-0.22.6, 0.23.0-0.23.12], leaving only versions: [0.18.0, 0.19.1-0.19.2, 0.20.0, 0.21.0-0.21.3, 0.21.5-0.21.12, 0.22.0-0.22.6, 0.23.0-0.23.12]
│ └─VectorizedRoutines [0e69188a] log:
│ ├─possible versions are: 0.1.0 or uninstalled
│ └─restricted to versions * by an explicit requirement, leaving only versions 0.1.0
└─restricted by compatibility requirements with SpecialFunctions [276daf66] to versions: [0.24.4-0.24.18, 0.25.0-0.25.41] or uninstalled — no versions left
└─SpecialFunctions [276daf66] log:
├─possible versions are: [0.7.0-0.7.2, 0.8.0, 0.9.0, 0.10.0-0.10.3, 1.0.0, 1.1.0, 1.2.0-1.2.1, 1.3.0, 1.4.0-1.4.2, 1.5.0-1.5.1, 1.6.0-1.6.2, 1.7.0, 1.8.0-1.8.1, 2.0.0] or uninstalled
├─restricted by compatibility requirements with ForwardDiff [f6369f11] to versions: [0.7.0-0.7.2, 0.8.0, 0.9.0, 0.10.0-0.10.3, 1.0.0, 1.1.0, 1.2.0-1.2.1, 1.3.0, 1.4.0-1.4.2, 1.5.0-1.5.1, 1.6.0-1.6.2, 1.7.0, 1.8.0-1.8.1, 2.0.0]
│ └─ForwardDiff [f6369f11] log:
│ ├─possible versions are: [0.9.0, 0.10.0-0.10.25] or uninstalled
│ ├─restricted to versions * by an explicit requirement, leaving only versions [0.9.0, 0.10.0-0.10.25]
│ └─restricted by compatibility requirements with Zygote [e88e6eb3] to versions: 0.10.0-0.10.25
│ └─Zygote [e88e6eb3] log:
│ ├─possible versions are: [0.1.0, 0.2.0, 0.3.0-0.3.4, 0.4.0-0.4.22, 0.5.0-0.5.17, 0.6.0-0.6.34] or uninstalled
│ └─restricted to versions 0.6.34 by an explicit requirement, leaving only versions 0.6.34
├─restricted by compatibility requirements with Zygote [e88e6eb3] to versions: [1.6.0-1.6.2, 1.7.0, 1.8.0-1.8.1, 2.0.0]
│ └─Zygote [e88e6eb3] log: see above
└─restricted by compatibility requirements with AutoGrad [6710c13c] to versions: [0.7.0-0.7.2, 0.8.0, 0.9.0, 0.10.0-0.10.3, 1.0.0, 1.1.0, 1.2.0-1.2.1, 1.3.0, 1.4.0-1.4.2, 1.5.0-1.5.1, 1.6.0-1.6.2, 1.7.0, 1.8.0-1.8.1], leaving only versions: [1.6.0-1.6.2, 1.7.0, 1.8.0-1.8.1]
└─AutoGrad [6710c13c] log:
├─possible versions are: [1.0.0-1.0.1, 1.1.0-1.1.6, 1.2.0-1.2.4] or uninstalled
└─restricted to versions * by an explicit requirement, leaving only versions [1.0.0-1.0.1, 1.1.0-1.1.6, 1.2.0-1.2.4]