Plots.jl: How to plot contourf with GR?

[juliohm]

When I specify the seriestype :contourf with PyPlot and PlotlyJS, I get a nice colored contour map:

With GR, the contours don't show up:

but I know that GR is capable of drawing these colored contours, see the illustration in the homepage: https://gr-framework.org

[juliohm]

cc: @jheinen

[mkborregaard]

This looks weird, is it screenshots or based on savefig?

[juliohm]

@mkborregaard these are screenshots, and I think I have read other threads for which I don't have the URLs unfortunately where people discuss the difference between heatmaps, contour plots and etc. in GR and other backends. It would be nice to have GR working here, I am trying to rely on it the most in my package and tutorials.

[mkborregaard]

Can you post an MWE to replicate? It makes it easier to troubleshoot.

[juliohm]

I have one tutorial that is working with the master branch, but it may break soon, as I am trying to transition the problem definitions to a separate package: https://github.com/juliohm/GeoStats.jl/blob/master/examples/EstimationProblems.ipynb

[jheinen]

I'm currently busy, but I'll check this ASAP. Kind of a color quantization in GR might help ...

[jheinen]

@juliohm : where is GeoDataFrame defined?

# inform the coordinates of the data
geodata = GeoDataFrame(df, [:x,:y])
ERROR: UndefVarError: GeoDataFrame not defined

[juliohm]

Hi Josef, it should be in GeoStats.jl master branch, I can check it
tomorrow...

On Aug 31, 2017 11:00 PM, "Josef Heinen" [e-mail] wrote:

@juliohm https://github.com/juliohm : where is GeoDataFrame defined?

inform the coordinates of the data

geodata = GeoDataFrame(df, [:x,:y])
ERROR: UndefVarError: GeoDataFrame not defined

—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub
https://github.com/JuliaPlots/Plots.jl/issues/1024#issuecomment-326496228,
or mute the thread
https://github.com/notifications/unsubscribe-auth/ADMLbbwljIFbw6idnLTE2V9ELZB3Z46eks5sd52TgaJpZM4O8YTq
.

[jheinen]

I'm already on GeoStats master - will try another MWE ...

[juliohm]

Sorry, I may have corrupted the master branch with the transitions to
GeoStatsBase.jl. Any plot recipe with contourf reproduces the issue though.
Thank you again for looking into this, I'm going to bed, but will double
check tomorrow morning where the GeoDataFrame ended up.

On Aug 31, 2017 11:05 PM, "Josef Heinen" [e-mail] wrote:

I'm already on GeoStats master - will try another MWE ...

—
You are receiving this because you were mentioned.
Reply to this email directly, view it on GitHub
https://github.com/JuliaPlots/Plots.jl/issues/1024#issuecomment-326496798,
or mute the thread
https://github.com/notifications/unsubscribe-auth/ADMLbapaEUS1N9i7iXAj4X0MgWbqrVneks5sd56UgaJpZM4O8YTq
.

[jheinen]

Color quantization produces pixelated results - we have to implement a dedicated function in GR. So there is no short-time solution - I put it onto our TODO list ;-)

[juliohm]

Thank you @jheinen, whenever you find time :-)

[juliohm]

I want this feature so much :sob: @jheinen from what I understood there is no function in the GR framework at the moment for filled contour plots, is that correct? I would try to wrap the function myself if it was already there waiting to be called.

[SimonDanisch]

The glvisualize backend has it :) admittedly, I only recently got around to create a color legend but only in Makie, though :(

[juliohm]

Nice @SimonDanisch, it is great that we have so many options at our disposal. I will switch to Makie when plot recipes are in place and working smoothly. I see the huge benefit of adding interactivity and I am looking forward to see the package mature.

[aramirezreyes]

Apparenly this has been resolved in GR
https://github.com/jheinen/GR.jl/issues/165#issuecomment-438518409
Is there anything that should be done to make it work on Plots.jl?

[mkborregaard]

Yes, the Plots GR backend needs to actually call GR's contourf function for the contourf seriestype. I think @jheinen looked into this?

[jheinen]

I made a PR (#1880) to support the new contourf function.

[mkborregaard]

Awesome!

[jheinen]

There is still some problem with the contour routines in GR. Will fix them soon and tag a new GR release next week ...

[juliohm]

What problems @jheinen ? They seem to be working wonderfully now :heart:

[jheinen]

I fixed it yesterday - was a problem in v0.36.0+ versions.

[aramirezreyes]

Thanks for the good work!

On Jan 8, 2019, at 10:28 AM, Josef Heinen [e-mail] wrote:

I fixed it yesterday - was a problem in v0.36.0+ versions.

—
You are receiving this because you commented.
Reply to this email directly, view it on GitHub https://github.com/JuliaPlots/Plots.jl/issues/1024#issuecomment-452402559, or mute the thread https://github.com/notifications/unsubscribe-auth/AGqzeYV71f1iqFaSlzsnOPzV-zwPauHcks5vBONRgaJpZM4O8YTq.