image_rgba.py — Anaconda Enterprise 4.4 documentation

Anaconda Enterprise: Documentation

# image_rgba.py

    from __future__ import division

    import numpy as np

    from bokeh.plotting import figure, show, output_file

    N = 20
    img = np.empty((N,N), dtype=np.uint32)
    view = img.view(dtype=np.uint8).reshape((N, N, 4))
    for i in range(N):
        for j in range(N):
            view[i, j, 0] = int(i/N*255)
            view[i, j, 1] = 158
            view[i, j, 2] = int(j/N*255)
            view[i, j, 3] = 255

    p = figure(x_range=(0,10), y_range=(0,10))

    # must give a vector of images
    p.image_rgba(image=[img], x=0, y=0, dw=10, dh=10)

    output_file("image_rgba.html", title="image_rgba.py example")

    show(p)  # open a browser