bokeh test

bokeh_test.py

# -*- coding: utf-8 -*-
"""
Created on 04/16/16 14:57:14

Bokehであそぶテスト

@author: eqs
"""

import sys
import numpy as np

from bokeh.plotting import Figure
from bokeh.models import ColumnDataSource, HBox, VBoxForm
from bokeh.models.widgets import Slider
from bokeh.io import curdoc

N = 1000
x = np.linspace(0, 4 * np.pi, N)
y = np.sin(x)

source = ColumnDataSource(data=dict(x=x, y=y))

plot = Figure(plot_height=800, plot_width=800, title='my sine wave',
              tools='crosshair,pan,reset,resize,save,wheel_zoom',
              x_range=[0, 4*np.pi], y_range=[-5.0, 5.0])
plot.line('x', 'y', source=source, line_width=3, line_alpha=0.6)

offset = Slider(title='offset', value=0.0, start=-5.0, end=5.0, step=0.1)
amplitude = Slider(title='amplitude', value=1.0, start=1.0, end=5.0)
phase = Slider(title='phase', value=0.0, start=-2*np.pi, end=2*np.pi)
freq = Slider(title='freq', value=1.0, start=0.1, end=100.0)

def update_data(attrname, old, new):
    a = amplitude.value
    b = offset.value
    f = freq.value
    p = phase.value
    
    x = np.linspace(0, 4 * np.pi, N)
    y = a * np.sin(f * x + p) + b

    source.data = dict(x=x, y=y)

widgets = [offset, amplitude, phase, freq]
for w in widgets:
    w.on_change('value', update_data)


params = VBoxForm(children=widgets)

curdoc().add_root(HBox(children=[params, plot], width=1600))