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.
Questions tagged [datashader]
123 questions
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Datashader histogram a line
I have some time series data whereby each column signifies a y value, and the density for that y, per time, are the values within that column…
Sigmund Fraud
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Plotting multiple groups from a dataframe with datashader as lines
I am trying to make plots with datashader. the data itself is a time series of points in polar coordiantes. i managed to transform them to cartesian coordianted(to have equal spaced pixles) and i can plot them with datashader.
the point where i am…
Taiko
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Datashader: categorical colormapping of GeoDataFrames
Installed packages
datashader 0.13.0
holoviews 1.14.4
geoviews 1.9.1
bokeh 2.3.2
What I'm trying to do
I'm trying to recreate a choropleth map with one color mapped to one category in a large GeoDataFrame using Datashader, following this example…
grg
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Using Holoviews and Bokeh to plot 1 billion points, need to capture the lasso geometry to obtain the selected points
I am very new to Holoviews/DataShader/Bokeh, analyzing these libraries for a research project.
I have a requirement to plot on 1 billion plots in a scatter plot and then on lasso of the plot capture the selected points , preferably the geometry of…
Tasneem Talawalla
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How do you fill or intrerpolate sparse data empty space (undersampling) in a datashader heatmap?
When plotting a set of data in datashader it will, if the X-axis has discrete numbers and undersampling, leave gaps between the colums where the background can be seen.
I have been trying to fix this by trying to set a larger point size or by using…
Rainer Bärs
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1 answer
convert matplotlib to interactive holoviews + datashader visualization (ideally with interactive brush)
How can I port the following plot to hvplot + datashader?
Ideally, interactivity can be preserved and certain device_id can interactively be subselected. (ideally using a brush i.e. when selecting an anomalous point I want to be able to filter to…
Georg Heiler
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Troubles using dask distributed with datashader: 'can't pickle weakref objects'
I'm working with datashader and dask but I'm having problems when trying to plot with a cluster running. To make it more concrete, I have the following example (embedded in a bokeh plot):
import holoviews as hv
import pandas as pd
import…
vertebra
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Piecewise plotting in Datashader - data exceeds my ram
So I'm trying out Datashader, which looks and perform great. However, all the examples must be done either with a machine with massive ram, or just not that large datasets. Because I blow up my 16gb ram when I try to do some big plots. I have no…
bjornasm
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geoview is not showing any output
i am trying to visualize a very large data points on the map for that i am using datashade, I am trying to work on chicago crime dataset: https://www.kaggle.com/currie32/crimes-in-chicago . I am following the guidselines given in this tutorial-…
megh_sat
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How do we use Dask and Datashader together?
I want to plot time series data with the help of datashader.
I have all the data in the form of a NetCDF file.
Since the file is huge - about 2 gb long I don't want all the things to be loaded in the memory at the same time, so I am using Dask to…
Tushar Poddar
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2 answers
Datashader doesn't update with zooming in bokeh-plot
I try to plot a large dataseries with holoviews, bokey and datashader. The plot shows without any issues, but with zooming in, the plot doesn't change the resolution, so the dataseries is very pixelated.
I did it before on another PC and there it…
Maegges04
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Turn off automatic interaction HoloViews / Bokeh charts in Jupyter?
How do I have the chart display without any engagement buttons clicked on?
Would like the top button (see picture), which is currently defaulting on, to default off.
gumdropsteve
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datashader xarray.Image to holoviews Points
This is the code:
import datashader as ds
import pandas as pd
from colorcet import fire
from datashader import transfer_functions as tf
from datashader.utils import lnglat_to_meters
import holoviews as hv
import geoviews as gv
from…
rindis
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1 answer
Y-axis is not updated on dropdown selection when I use datashader in hvplot
When I make a normal hvplot with a groupby it creates a DynamicMap where the y-axis changes when I select a different value in my dropdown. This is the behavior I want.
However when I set datashade=True (with large data) the y-axis stays fixed,…
Sander van den Oord
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1 answer
hvplot - how to colour point data by categorical variable and aggregate with `ds.count_cat(.)`
I am trying to recreate the datashader census categorical examples with hvplot.
import cartopy.crs as ccrs
import datashader as ds
import dask.dataframe as dd
import hvplot.dask
ddf =…
andyandy
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