I recently had to interpolate some data in the setting of training some machine learning code, coded in Tensorflow. It turns out that the interpolator doesn’t work with the compiled Tensorflow functions, which is usually recommended for faster execution.

This is quite annoying, but has a simple solution using the

numpy_function

in Tensorflow.

`import tensorflow as tf`

import numpy as np

from scipy.interpolate import NearestNDInterpolator

x = np.linspace(0, 10, 10)

y = np.linspace(0, 10, 10)

z = np.sin(x + y)

interp = NearestNDInterpolator(list(zip(x, y)), z)points = tf.constant([[1, 2],

[3, 4],

[5, 6]], dtype=tf.float64)@tf.function

def test(x):

return interp(x)@tf.function

def test_2(x):

return tf.numpy_function(interp, inp=[x], Tout=tf.float64)print(test_2(points)) # Works

print(test(points)) # Doesn't work