makie.jl: ERROR: LoadError: UndefVarError: Downloads not defined

[bardo84]

Hi,

I get an

ERROR: LoadError: UndefVarError: Downloads not defined
Stacktrace:
 [1] top-level scope
   @ o:\Julia\makie.jl:604
in expression starting at o:\Julia\makie.jl:604

Commented out.

And on execution for all demo functions:

ERROR: UndefVarError: Options not defined
Stacktrace:
 [1] custom_plot()
   @ Main o:\Julia\makie.jl:16
 [2] top-level scope
   @ REPL[12]:1

Commented out.

On execution,

custom_plot()

no error, no plot appears.

[storopoli]

This could be a Julia version error. Since Downloads is a standard library module. Could you please post your Julia version and project status with package versions?

[bardo84]

Hi,
julia> VERSION
v"1.7.0-rc1"

(@v1.7) pkg> st
Status C:\Users\xxx\.julia\environments\v1.7\Project.toml
[6e4b80f9] BenchmarkTools v1.2.0
[13f3f980] CairoMakie v0.6.5
[e9467ef8] GLMakie v0.4.6
[4b11ee91] Gaston v1.0.4
[d0351b0e] InspectDR v0.4.3
[c3a54625] JET v0.5.0
[ee78f7c6] Makie v0.15.2
[961ee093] ModelingToolkit v6.5.2
[f0f68f2c] PlotlyJS v0.18.7
[91a5bcdd] Plots v1.22.3
[c46f51b8] ProfileView v0.6.10
[295af30f] Revise v3.1.20
[276b4fcb] WGLMakie v0.4.6

[storopoli]

I haven’t played yet with Julia 1.7. @rikhuijzer any suggestions?

[rikhuijzer]

Hi,

I get an

ERROR: LoadError: UndefVarError: Downloads not defined
Stacktrace:
 [1] top-level scope
   @ o:\Julia\makie.jl:604
in expression starting at o:\Julia\makie.jl:604

Commented out.

And on execution for all demo functions:

ERROR: UndefVarError: Options not defined
Stacktrace:
 [1] custom_plot()
   @ Main o:\Julia\makie.jl:16
 [2] top-level scope
   @ REPL[12]:1

Commented out.

On execution,

custom_plot()

no error, no plot appears.

Hi, @bardo84. Thank you for taking a look at our book and opening an issue. To allow us to help you, could you elaborate on what you're trying to achieve?

[bardo84]

I was trying to run this file.
Maybe I did not get your question.

[rikhuijzer]

I was trying to run this file. Maybe I did not get your question.

Okay. That file is part of the JDS (Julia Data Science) package. It is not intended to be run as a separate script. We explain why in Section 1.2.

Is your intention to re-create the plots and modify them ever so slightly to get the hang of plotting? In that case, it's probably easiest to run Pluto.jl and copy paste the code from this book. Of course, there are easier ways than this to do it, but I don't know what your experience level is with Julia and what development environment you are using. Pluto is the safest bet to get things running, especially when plotting is involved. An demo of Pluto with plotting is at https://www.youtube.com/watch?v=jdEqGOv8ycc.

[bardo84]

Package dependency, ok, understand.
My experience level is low in this regard.
Is there a way to write the script that it would have requested to load the package?

[rikhuijzer]

My experience level is low in this regard.
Is there a way to write the script that it would have requested to load the package?

Then definitely checkout Pluto.jl. It can manage package dependencies for you automatically. Also, most (if not all) of our Makie.jl plots are stand alone, meaning that you can just copy paste the code in Pluto and see the results. For example, just copy paste

using Makie
using CairoMakie
scatterlines(1:10, 1:10)

into Pluto.jl and you should see a nice plot. See the aforementioned YouTube video for instructions on how to get Pluto.jl running.

[bardo84]

OK, thx for your help!

[storopoli]

Oh sorry. I though you were trying to run the source code for the book. Rik’s suggestions are great. Don’t hesitate to reach out the Julia’s discourse (discourse.julialang.org).