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Questions - altair

Altair: formatting tooltip ordinal datetime

The output of my live tooltip example is: Where the x-axis is formatted at ordinal dates; but the chart is also run through Streamlit, which appears to produce timestamps in milliseconds from the epo...
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smgeneralist

python

python-3.x

pandas

altair

Votes: 0

Answers: 1

Latest Answer

If you were to first add a second y, say y2, to your dataframe that had the dates: df = pd.DataFrame({ 'x': range(20), 'y': pd.date_range(end='2022-01-18', periods=20, freq='B').view(np.int64) / int(1...
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MichiganMadeLearner

altair python package gives "Illegal instruction" on Raspberry PI

In my RaspberryPI ZERO W I got strange error when trying to import altair module in python script. pi@raspberrypi:~ $ python3 Python 3.7.3 (default, Jul 25 2020, 13:03:44) [GCC 8.3.0] on linux Type &...
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Ján Strompl

python

altair

raspberry-pi-zero

Votes: 0

Answers: 1

Latest Answer

Illegal Instruction means that you are importing a C extension that is compiled incorrectly for the system you are using. Altair itself doesn't have any C extensions, but it depends on a number of lib...
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jakevdp

Altair tooltip with local PIL image

Following the official example from the docs I can successfully create an altair scatter plot with each point having a tooltip: import altair as alt import pandas as pd source = pd.DataFrame.from_rec...
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v.tralala

python

jupyter-notebook

python-imaging-library

altair

Votes: 0

Answers: 1

Latest Answer

Ok I kind of figured it out. One has to add a prefix data:image/png;base64, to the data. The code is now as follows: import PIL.Image from io import BytesIO import base64 def image_formatter2(im): ...
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v.tralala

Extra tick not showing in the Altair bar chart

So I started with Altair, so far very intuitive, but I can't make an extra tick position to show, no matter what I do. My code looks like this: alt.Chart(df3).mark_bar(opacity=0.8).encode( x=alt.X...
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botafogo

python-3.x

bar-chart

altair

Votes: 0

Answers: 1

Latest Answer

To specify exact axis limits, you can use the domain property of the scale. alt.Chart(cars).mark_point().encode( alt.X('Acceleration:Q', scale=alt.Scale(domain=(5, 20)) ), y='Horse...
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Mattijn

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