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- """Interactive plot with a slider
- to change the k value of a sigmoid function."""
- import numpy as np
- from vedo import Plotter, settings
- from vedo.pyplot import plot
- kinit = 0.75
- n = 3
- x = np.linspace(-1, 1, 100)
- def update_plot(widget=None, event=""):
- k = widget.value if widget else kinit
- # y = 1/(1 + (k/x)**n) # hill function
- # y = np.abs(k*x)**n *np.sign(k*x) # power law
- y = (2 / (1 + np.exp(-np.abs(n*k*x))) - 1) *np.sign(k*x) # sigmoid
- p = plot(x, y, c='red5', lw=4, xlim=(-1,1), ylim=(-1,1), aspect=1)
- plt.remove("PlotXY").add(p)
- settings.default_font = "Roboto"
- plt = Plotter(size=(900, 1050))
- plt.add_slider(update_plot, -1, 1, value=kinit, title="k value", c="red3")
- update_plot()
- plt.show(__doc__, mode="2d", zoom='tight')
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