plotly: huge number of datapoints

Question

I am trying to plot something with a huge number of data points (2mm-3mm) using plotly.

When I run

py.iplot(fig, filename='test plot')

I get the following error:

Woah there! Look at all those points! Due to browser limitations, the Plotly SVG drawing functions have a hard time graphing more than 500k data points for line charts, or 40k points for other types of charts. Here are some suggestions:
(1) Use the `plotly.graph_objs.Scattergl` trace object to generate a WebGl graph.
(2) Trying using the image API to return an image instead of a graph URL
(3) Use matplotlib
(4) See if you can create your visualization with fewer data points

If the visualization you're using aggregates points (e.g., box plot, histogram, etc.) you can disregard this warning.

So then I try to save it with this:

py.image.save_as(fig, 'my_plot.png')

But then I get this error:

PlotlyRequestError: Unknown Image Server Error

How do I do this properly? I don't care if it's a still image or an interactive display within my notebook.

Answer 1

one option would be down-sampling your data, not sure if you'd like that: https://github.com/devoxi/lttb-py

I also have problems with plotly in the browser with large datasets - if anyone has solutions, please write! Thank you!