William de Vazelhes wdevazelhes

Researcher @tiiuae

wdevazelhes / sdml_expr.py

Created May 16, 2018 16:45

	import numpy as np
	from scipy.sparse.csgraph import laplacian
	from sklearn.utils import check_random_state
	from scipy.sparse import coo_matrix
	from numpy.testing import assert_array_almost_equal

	RNG = check_random_state(0)

	def test_loss_sdml():
	n_samples = 10

wdevazelhes / compare_gradients_mlkr.py

Last active August 16, 2018 10:06

Code for comparing two implementations of the gradient for MLKR

	from metric_learn import MLKR
	from sklearn.utils import check_random_state
	import numpy as np
	from losses import _loss_non_optimized, _loss_optimized
	from collections import defaultdict
	from sklearn.datasets import make_regression


	for n_features in [5, 100]:
	print('n_features={}'.format(n_features))

wdevazelhes / sdml_expr_numerical_uncertainty.py

Last active January 16, 2019 09:08

This gist explains why the two equivalent ways to compute the loss for sdml can be slightly different because of numerical uncertainties

	import numpy as np
	from scipy.sparse.csgraph import laplacian
	from sklearn.utils import check_random_state
	from scipy.sparse import coo_matrix
	from numpy.testing import assert_allclose

	RNG = check_random_state(0)

	def test_loss_sdml_uncertainties():
	n_samples = 10

wdevazelhes / kernel_attention.py

Last active June 9, 2019 18:43

trying to use kernel approximations by explicit feature maps for softmax self-attention

	import numpy as np
	from sklearn.utils.extmath import softmax
	from sklearn.kernel_approximation import RBFSampler
	from sklearn_extra.kernel_approximation import Fastfood

	seed = 42
	rng = np.random.RandomState(seed)

	D = 20