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scipy.spatial.

# tsearch

scipy.spatial.tsearch(tri, xi)

  Find simplices containing the given points. This function does the same thing as `Delaunay.find_simplex`.

  Parameters:
    triDelaunayInfo

      Delaunay triangulation

    xindarray of double, shape (…, ndim)

      Points to locate

  Returns:
    indarray of int, same shape as xi

      Indices of simplices containing each point. Points outside the triangulation get the value -1.

  See also

  `Delaunay.find_simplex`

  Notes

  Added in version 0.9.

  Examples

      >>> import numpy as np
      >>> import matplotlib.pyplot as plt
      >>> from scipy.spatial import Delaunay, delaunay_plot_2d, tsearch
      >>> rng = np.random.default_rng()

  The Delaunay triangulation of a set of random points:

      >>> pts = rng.random((20, 2))
      >>> tri = Delaunay(pts)
      >>> _ = delaunay_plot_2d(tri)

  Find the simplices containing a given set of points:

      >>> loc = rng.uniform(0.2, 0.8, (5, 2))
      >>> s = tsearch(tri, loc)
      >>> plt.triplot(pts[:, 0], pts[:, 1], tri.simplices[s], 'b-', mask=s==-1)
      >>> plt.scatter(loc[:, 0], loc[:, 1], c='r', marker='x')
      >>> plt.show()