NearestNDInterpolator

class numeric.interpolate.NearestNDInterpolator(object)

NearestNDInterpolator(x, y) Nearest-neighbor interpolation in N dimensions.

x(Npoints, Ndims) ndarray of floats

Data point coordinates.

y(Npoints,) ndarray of float

Data values.

Examples:

def func(x,y,z):
    return 0.5*(3)**(1./2)-((x-0.5)**2+(y-0.5)**2+(z-0.5)**2)**(1./2)

x = random.rand(1000)
y = random.rand(1000)
z = random.rand(1000)
v = func(x,y,z)

f = interpolate.NearestNDInterpolator([x,y,z], v)

gx = linspace(x.min(), x.max(), 50)
gy = linspace(y.min(), y.max(), 50)
gz = linspace(z.min(), z.max(), 50)
xx,yy,zz = meshgrid(gx, gy, gz)
gv = f([xx,yy,zz])

levs = arange(0.1, 1.1, 0.1)
scatter3(x, y, z, c=v, levels=levs)
scatter3(xx, yy, zz, c=gv, s=2, levels=levs, alpha=0.5)
colorbar()