import numpy as np
import holoviews as hv
from holoviews import dim

hv.extension('matplotlib')

np.random.seed(42)
coords = [(i, np.random.random()) for i in range(20)]
scatter = hv.Scatter(coords)

scatter.opts(color='k', marker='s', s=50)

scatter[0:12] + scatter[12:20]

np.random.seed(10)
data = np.random.rand(100,4)

scatter = hv.Scatter(data, vdims=['y', 'z', 'size'])
scatter = scatter.opts(color='z', s=dim('size')*20)
scatter + scatter[0.3:0.7, 0.3:0.7].hist('z')