def test_surf():
    def f(x, y):
        sin, cos = numpy.sin, numpy.cos
        return sin(x + y) + sin(2 * x - y) + cos(3 * x + 4 * y)

    x, y = numpy.mgrid[-7.:7.05:0.1, -5.:5.05:0.05]
    s = surf(x, y, f)
    #cs = contour_surf(x, y, f, contour_z=0)
    return s
Returns:
dataset/ETHPy150Open enthought/mayavi/mayavi/tools/helper_functions.py/test_surf--crossover with--dataset/ETHPy150Open meraki-analytics/cassiopeia/cassiopeia/type/core/match.py/Match.participants