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Add link selections support to AdjointLayout

See original GitHub issue

Description of expected behavior and the observed behavior

Linking plots in an adjoint layout like link_selections(spreaded << histogram) is currently not supported

Complete, minimal, self-contained example code that reproduces the issue

import numpy as np
import pandas as pd
import datashader as ds
import holoviews.operation.datashader as hd
import holoviews as hv
from holoviews.selection import link_selections

hv.extension('bokeh')

num = 100000
np.random.seed(1)

dists = {
    cat: pd.DataFrame({
        'x': np.random.normal(x, s, num), 
        'y': np.random.normal(y, s, num), 
        'val': np.random.normal(val, 1.5, num), 
        'cat': cat
    }) for x,  y,  s,  val, cat in 
     [(  2,  2, 0.03, 10, "d1"), 
      (  2, -2, 0.10, 20, "d2"), 
      ( -2, -2, 0.50, 30, "d3"), 
      ( -2,  2, 1.00, 40, "d4"), 
      (  0,  0, 3.00, 50, "d5")]
}

points = hv.Points(pd.concat(dists), ['x', 'y'], ['val', 'cat'])
datashaded = hd.datashade(points, aggregator=ds.count_cat('cat'))
spreaded = hd.dynspread(datashaded, threshold=0.50, how='over').opts(tools=['box_select', 'lasso_select'])

# Declare dim expression to color by cluster
dim_expr = ((0.1+hv.dim('val')/10).round()).categorize(hv.Cycle('Set1').values)
histogram = points.hist(num_bins=60, adjoin=False, normed=False).opts(color=dim_expr)

link_selections(hv.AdjointLayout({'main':spreaded, 'top': histogram, 'right': histogram}))  # Does not work
# link_selections(spreaded + histogram)  # works

Which looks like: drawing And does not have working linked selection tools

ALL software version info

Python: 3.9.6
numpy     : 1.21.0
bokeh     : 2.3.3
datashader: 0.13.0
holoviews : 1.14.4
pandas    : 1.3.0

Issue Analytics

State:
Created 2 years ago
Comments:8 (8 by maintainers)

Top GitHub Comments

1reaction

peterroelantscommented, Jul 18, 2021

I filed a seperate issue on the selection tool on master branch only working once: https://github.com/holoviz/holoviews/issues/5029

1reaction

peterroelantscommented, Jul 17, 2021

The naive solution works on v1.14.4: https://github.com/holoviz/holoviews/pull/5030

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