https://github.com/benjaminleighton/xarrayfrac

example custom xarray backend that dynamically generates mandelbrot fractals
https://github.com/benjaminleighton/xarrayfrac

custom-backend dask fractal mandelbrot xarray

Last synced: about 2 months ago
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example custom xarray backend that dynamically generates mandelbrot fractals

• Host: GitHub
• URL: https://github.com/benjaminleighton/xarrayfrac
• Owner: benjaminleighton
• License: other
• Created: 2022-01-08T10:46:08.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2022-02-18T04:35:55.000Z (over 3 years ago)
• Last Synced: 2025-03-27T18:51:31.765Z (3 months ago)
• Topics: custom-backend, dask, fractal, mandelbrot, xarray
• Language: Jupyter Notebook
• Homepage:
• Size: 254 KB
• Stars: 2
• Watchers: 1
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE.txt

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README

        
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# xarrayfrac

A dynamic generative mandelbrot custom backend for xarray

```

pip install xarrayfrac

```

```

import numpy as np

import xarray as xr

from matplotlib import pyplot as plt

# request a 10 billion pixel lazy xarray fractal

ds = xr.open_dataset(None, engine="xarrayfrac", resolution=100000, chunks={"x": 2000, "y": 2000})

# sample 1 in every 10000 pixels

sampled = ds.frac.isel(x=slice(0, 100000, 100), y=slice(0, 100000, 100))

# compute and display

plt.imshow(sampled)

```

![mandelbrot fractal in xarray](https://raw.githubusercontent.com/benjaminleighton/xarray_frac/main/frac1.png)

```

# request a 10 billion pixel lazy xarray fractal

ds = xr.open_dataset(None, engine="xarrayfrac", resolution=100000, chunks={"x": 2000, "y": 2000})

# zoom 

window = ds.sel(x=slice(-0.1, 0.1), y=slice(0.9, 1.0))

# plot every hundredth pixel of the window

plt.imshow(window.frac[::10, ::10])

```

![zoomed mandelbrot fractal in xarray](https://raw.githubusercontent.com/benjaminleighton/xarray_frac/main/frac2.png)