Stack Overflow
Stack Overflow

Questions tagged [datashader]

Use for questions concerning the Python based Graphics Pipeline which is meant for building visualizations of large data sets.

Datashader is a python graphics pipeline system for creating meaningful representations of large amounts of data.

FAQ

Docs

GitHub

123 questions
0
votes
0 answers

How can I have the plottetd points stay the same size when zooming in with holoviews?

I am plotting points on a map with holoviews in python and I want to have the plotted points stay the same size even if I zoom in. I am using the bokeh extension. I have found this post solving the problem for bokeh, here is a link. But I have not…
sehan2
  • 1,700
  • 1
  • 10
  • 23
0
votes
1 answer

How to troubleshoot xarray.open_rasterio parsing?

I want to rasterize smaller shades of high-resolution GeoTIFFs. xarray.open_rasterio seemed the right tool to get what datashader.transfer_functions.shade would need. However, the returned DataArray also has a band, which trips up shade. Several…
László
  • 3,914
  • 8
  • 34
  • 49
0
votes
1 answer

Aggregation column category not found - when I set datashader = True with Hvplot

I'm using Hvplot to create 2 scatterplots based on the category the data falls in. Since there are so many datapoints, I'm using datashade. My plot works fine when I don't use datashade. However when I set datashade=True in my code below I get the…
Sander van den Oord
  • 10,986
  • 5
  • 51
  • 96
0
votes
1 answer

Prevent the colormap to be rescaled when using datashader to rerender an image as it is zoomed in

I want to use datashader's automatic downsampling and rerendering upon zoom to display large images. Reading the docs and forums for holoviews, bokeh, and datashader, it is my understanding that it is preferable to do this via Holoviews instead of…
joelostblom
  • 43,590
  • 17
  • 150
  • 159
0
votes
1 answer

How to connect holoviews in backend with bokehjs frontend

I'm developing a webpage that needs to plot millions of points, so I'm using HoloViews in my backend to generate a plot and send it as a Bokeh model to my frontend which uses Bokehjs. So in the API I call a function that does…
Diego Rodriguez
  • 5
  • 1
0
votes
1 answer

Error when building graph with bundle_graph/datashader

I'm going through this tutorial to learn a bit about datashader and bokeh. Most of it seems to be fine, except a few examples. For example, this code: %%opts Nodes (size=5) graph = layout_nodes(hv.Graph(edges_df),…
Bob
  • 10,741
  • 27
  • 89
  • 143
0
votes
1 answer

Datashader with geospatial axes

I am trying to add an image generated with Python Datashader to Mapbox layers as an overlay (https://www.mapbox.com/mapbox-gl-js/example/image-on-a-map/). However it results a misaligned layers like this (green is from Datashader, gray is from…
thama
  • 51
  • 6
0
votes
1 answer

Installing datashader LLVM_CONFIG

I have attempted installing datashader on my linux system python3. I have tried: pip install datashader pip3 install datashader These both fail due to LLVM_CONFIG not being in path. So, I tried to install LLVM and I have something but not the…
user2945234
  • 418
  • 6
  • 12
0
votes
2 answers

how can i change the size of points in my map in holoviews?

here is my code: import holoviews as hv import datashader as ds import dask.dataframe as dd import geoviews as gv from cartopy import crs from holoviews.operation.datashader import datashade hv.extension('bokeh', width=95) %opts RGB …
BozhiWang
  • 103
  • 3
  • 7
0
votes
1 answer

Can I use datashader methods over bokeh figure?

I have a bokeh figure object. This object represents a map which is plotted with millions of points. I want to use datashader for this figure. How can I do it? I know there is InteractiveImage in bokeh extension of datashader. similarly is there any…
Cracken
  • 306
  • 2
  • 5
  • 17
0
votes
1 answer

Issue Controlling Size of Holoviews + Datashader with Matplotlib Backend

I'm currently trying to use holoviews+datashader with the matplotlib backend. The data I'm using has very different x and y ranges and the result is that the datashader plots are stretched unhelpfully. The opts and output keywords I've tried using…
laurennc
  • 13
  • 7
0
votes
1 answer

Bokeh + Datashader + Bokeh - Capture Mouse Double Tap

I'm implementing a ScatterPlot for Big Data using Bokeh, DataShader and HoloViews. The ScatterPlot part itself is pretty much done but there is one requirement I'm having issues with: I need to be able to capture the data coordinates where the user…
Martin Garcia
  • 345
  • 5
  • 14
0
votes
0 answers

TypeError during DataShader aggregate creation between Python 3.5 and 3.6 environments

I've been working with the bokeh/datashader dashboard in python 3.6.X developing some additional functionality into the dashboard project. When the project is executed in a 3.5.2 Python environment I run into a TypeError: data type not understood…
Daniel Homer
  • 1
  • 2
0
votes
0 answers

datashader import fails - DLL load failed

Getting datashader module installed and imported in jupyter notebook seems tricky somehow. I installed datashader from my anaconda prompt as such: conda install -c bokeh datashader it installed the module correctly in the dir:…
ad_s
  • 1,560
  • 4
  • 15
  • 16
0
votes
2 answers

Datashader - Can it work with timestamp on x-axis without converting it to milliseconds as shown in an example

I am going through a notebook available to plot time series using data shader and noticed that they have converted the time series vales to 'ms' and then used these values for x-axis https://anaconda.org/jbednar/tseries/notebook Can I have x-axis as…
RTM
  • 759
  • 2
  • 9
  • 22
1 2 3
…
8
9