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# scipy.stats.gaussian_kde.set_bandwidth

`gaussian_kde.``set_bandwidth`(bw_method=None)

  Compute the estimator bandwidth with given method.

  The new bandwidth calculated after a call to `set_bandwidth` is used for subsequent evaluations of the estimated density.

  Parameters : | bw_method : str, scalar or callable, optional The method used to calculate the estimator bandwidth. This can be ‘scott’, ‘silverman’, a scalar constant or a callable. If a scalar, this will be used directly as kde.factor. If a callable, it should take a `gaussian_kde` instance as only parameter and return a scalar. If None (default), nothing happens; the current kde.covariance_factor method is kept.

  Notes

  New in version 0.11.

  Examples

      >>> x1 = np.array([-7, -5, 1, 4, 5.])
      >>> kde = stats.gaussian_kde(x1)
      >>> xs = np.linspace(-10, 10, num=50)
      >>> y1 = kde(xs)
      >>> kde.set_bandwidth(bw_method='silverman')
      >>> y2 = kde(xs)
      >>> kde.set_bandwidth(bw_method=kde.factor / 3.)
      >>> y3 = kde(xs)

      >>> fig = plt.figure()
      >>> ax = fig.add_subplot(111)
      >>> ax.plot(x1, np.ones(x1.shape) / (4. * x1.size), 'bo',
      ...         label='Data points (rescaled)')
      >>> ax.plot(xs, y1, label='Scott (default)')
      >>> ax.plot(xs, y2, label='Silverman')
      >>> ax.plot(xs, y3, label='Const (1/3 * Silverman)')
      >>> ax.legend()
      >>> plt.show()

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