julia> clibraries()
5-element Array{Symbol,1}:
:Plots
:cmocean
:misc
:colorcet
:colorbrewer
Misc, is supposed to contain the jet colormap, when I try this simple code
using Plots
using ColorSchemes
gr()
p = heatmap(rand(100,100), aspect_ratio=:equal, axis=false,c =:jet)
display(p)
I get the error:
ERROR: LoadError: Unknown color: jet
When I try to use jet1 from matplotlib for instance, I get the exact same error.
What should I do if I want to use the jet colormap from misc or any other colormap from matplotlib?
Are you using an old version of Plots? clibraries isnāt used anymore - today you can use all color schemes from ColorSchemes.jl. Check these docs: ColorSchemes Ā· Plots
This includes jet1 as well as all other matplotlib schemes.
Note though that the jet color gradient doesnāt fulfill the criteria for a good color scheme in scientific visualization - Iād strongly suggest finding an alternative.
Yes I literally describe exactly what to do above. You should update Plots (make sure you are on a recent version of Julia too) and follow the documentation in the link I posted.
Thank you!
When I try to update julia on Debian, it said that julia is already up to date. In fact, I am currently running julia 1.0.3. but the Debian repo do not have any further version available (using apt). This is certainly the problem.
This means I have to install it manually. I really donāt like going manually in usr/share and those sorts of files to install things because I always fear to have different versions at the same time and not knowing how to use one or the other, and then not being able to completely remove and purge one or the other.
Ah, yes, the Debian repo is really outdated. Can you install from Snap on Debian? I believe that is recent. Otherwise these are the official installation instructions Platform Specific Instructions for Official Binaries
or, if you want to stay with your current julia version, clibrary(:misc) should bring it into the namespace, so you can call it with color = :jet. Does that not work?
~$ sudo snap search julia
Name Version Publisher Notes Summary
julia 1.0.4 julialangā classic The Julia programming language
julia-mrcinv 1.4.2 mrcinv classic The Julia programming language
hledger-jak 0.21.3+git5236.70b03d87 juliank - An easy-to-use command-line/curses/web plaintext accounting tool
Should I download the one from mrcinv? (eventhough it is not from julialang)
As mentioned on the Julia Downloads page for linux, which Michael linked to above:
It is strongly recommended that the official generic binaries from the downloads page be used to install Julia on Linux
So I would really encourage you to follow this advice if at all possible - you donāt have to do much else than unzip a file on your local harddrive (and add Juliaās location to your PATH or create a symlink if desired), and youāll save yourself a lot of trouble down the line.
Do you know why your supervisor wants you to use jet? Of all the color maps out there jet has a number of problems (sharp transitions when the map is applied to images, where the underlying data is actually smoothly varying, very unfriendly to color blind users). Still if you have a application, where ārainbow mapsā are preferred since they show more detail at the expense of accuracy, I can recommend this article by Anton Mikhailov
