code: def _polynomial_matrix(x, powers):
      """Return monomials, with exponents from `powers`, evaluated at `x`."""
      out = np.empty((x.shape[0], powers.shape[0]), dtype=float)
      polynomial_matrix(x, powers, out)
      return out
  
file_path: catboost/contrib/python/scipy/py3/scipy/interpolate/_rbfinterp_pythran.py
imports: import numpy
label_desc: Use image node_id 14 for calling a global function with example usage: _polynomial_matrix(x, powers) and returns: out