PyViz is an initiative for making Python-based visualization tools work well together - includes holoviews, geoviews, datashader, hvplot, panel, colorcet, param and imagen.
Questions tagged [pyviz]
75 questions
1
vote
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
- 1,384
- 2
- 15
- 25
1
vote
1 answer
How to pass values of a single widget to multiple instances of one object in Panel/Bokeh
I build a dashboard to plot parts of a dataset, and it works when I declare every single component. As oall my plots are similar, with only changes being the title and the key to select the dataset to plot, I tried to use a class to describe my…
len75
- 23
- 3
1
vote
1 answer
How to display holoviews table with many columns completely
I have some DataFrames with many columns. When I try to visualize them with holoviews.Table, only the first columns are displayed.
For test purposes I created a DataFrame with 50 columns.
import pandas as pd
import panel as pn
import holoviews as…
mdk
- 398
- 2
- 8
1
vote
1 answer
Panel widgets do not update plot
I'm trying to use panel widgets inside a class in order to change a plot. The example below outputs the plot once, but when I select a different variable from the widget it doesn't update the plot.
import pandas as pd
import param
import holoviews…
Henrique Silva
- 45
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- 6
1
vote
2 answers
Specifying the default value in widgets generated by pyviz hvplot
I've got a 4D dataset and hvplot is nicely generating widgets for the dimensions I've specified in the groupby:
import xarray as xr
ds = xr.open_dataset('http://gamone.whoi.edu/thredds/dodsC/coawst_4/use/fmrc/coawst_4_use_best.ncd')
rho_vars =…
Rich Signell
- 14,842
- 4
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- 77
0
votes
0 answers
Interactive use of Datashader with matplotlib, 1.8 billion point array
I am working with geophysical data so now I have a 400k*512 "pixel" dataset that basically is "scans" times "samples".
The data exists as np array of the dimension mentioned above.
I need to visualize it interactively with zoom and all.
I found…
Terranigmus
- 43
- 6
0
votes
1 answer
Create python network graph from 3 dataframe columns unweighted using networkx and pyvis
Im working to create a python network graph utilizing the 3 pandas dataframe string columns - unweighted (python networks and pyviz)
I would like to link (nodes) the projects to country, and projects to company.
my table/dataframe is as…
German Portes
- 5
- 6
0
votes
0 answers
Chaging edge colors in Pyviz with a networkX graph
I have data in a networkX graph where every edge has a "Type", using pyviz I want to change the color of the edge according to the category.
Here is a sample code, I first set a color map:
color_map=nx.get_edge_attributes(G,'Type')
for key in…
Alejandro Diaz
- 41
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- 3
0
votes
0 answers
How to integrate dropdown to a dropdown in Panel
I am trying to implement a dropdown widget which houses other dropdowns as shown in the image below;
I am able to generate a dropdown using the Select widget, however, I am facing issues with integrating further dropdowns in one dropdown.
nikhil int
- 181
- 2
- 14
0
votes
2 answers
How to convert datashader canvas.points to GeoTiff?
I am interested on generating GeoTiff images given a set of scattered points, the dataset is normally between 500K points up to 2M points. I have been using datashader and geoviews to generate static images of the data and that works fine. However,…
Jonatan Aponte
- 429
- 1
- 5
- 10
0
votes
1 answer
Holoviews - how to set legend click_policy for decimated points
I'm trying to set click_policy to 'hide' in legend_opts for the object resulted from applying holoviews.operation.decimate on a set of hv.Points, but it doesn't seem to have the desired effect.
Now I'm using the muted_alpha option on the underlying…
bbudescu
- 313
- 1
- 3
- 9
0
votes
1 answer
How to set colormap midpoint in holoviews heatmap
I'm plotting a heatmap with holoviews using the Plotly backend.
import holoviews as hv
hv.HeatMap([(0,0,-10),(0,1,-9),(1,0,0),(1,1,2)]).opts(cmap="RdBu")
I'd like to set the colormap midpoint to 0 to make the diverging colormap meaningful. In…
Gere
- 12,075
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0
votes
1 answer
How can I set other edges invisible when I click on a node in pyvis.network // networkx?
Data:
Currently I am working on a quite big network. Therefore I am sending a picture of a part of nodes and edges.
pos = nx.nx_agraph.graphviz_layout(G, prog="twopi")
Xs=[a[0] for a in pos.values()]
Ys=[a[1] for a in pos.values()]
from…
Hakan Akgün
- 872
- 5
- 13
0
votes
1 answer
vs code, holoviews, hvplot, pyviz [SyntaxError: Unexpected token '?' at runCodeHere (... ] [Visual Studio Code]
Very frustrated*. Code works on jupyter lab, but not in Visual Studio Code.
I’ve created clean new environments, installed, removed, reinstalled [hours gone-by]. i’ve installed as per instructions (in clean environments) [eg., conda install -c…
0
votes
1 answer
Holoviews active tools configuration and datashader layout
Suppose having the following code:
# Layout creation
y1 = hv.Curve((dt, data['Noise 1']), 'Date', 'y(t)', label='Noise 1')
y2 = hv.Curve((dt, data['Noise 2']), 'Date', 'y(t)', label='Noise 2')
layout = y1 + y2
# Grid style layout
gridstyle = {
…
