bokeh_filter_example.py

import numpy as np
from bokeh.io import vform
from bokeh.models import CustomJS, ColumnDataSource, Slider
from bokeh.plotting import figure, output_file, show

output_file("callback.html")

orig_x, orig_y = np.arange(100), np.random.rand(100)
x, y = orig_x.copy(), orig_y.copy()

source_orig = ColumnDataSource(data=dict(x=orig_x, y=orig_y))
source = ColumnDataSource(data=dict(x=x, y=y))

plot = figure(plot_width=400, plot_height=400)
plot.line('x', 'y', source=source, line_width=3, line_alpha=0.6)

callback = CustomJS(args=dict(source=source, source_orig=source_orig), code="""
        var orig_data = source_orig.get('data');
        var data = source.get('data');
        var f = cb_obj.get('value');
        var orig_x = orig_data['x'];
        var orig_y = orig_data['y'];
        var new_x = [];
        var new_y = [];
        for (i = 0; i < orig_x.length; i++) {
            if (orig_x[i] > f) {
                new_x.push(orig_x[i]);
                new_y.push(orig_y[i]);
            }
        }
        data['x'] = new_x;
        data['y'] = new_y;
        source.trigger('change');
    """)

slider = Slider(start=0, end=100, value=1, step=1, title="minx", callback=callback)

layout = vform(slider, plot)

show(layout)