diff options
Diffstat (limited to 'lj_matrix/gauss_kernel.py')
| -rw-r--r-- | lj_matrix/gauss_kernel.py | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/lj_matrix/gauss_kernel.py b/lj_matrix/gauss_kernel.py deleted file mode 100644 index 5dd8e6406..000000000 --- a/lj_matrix/gauss_kernel.py +++ /dev/null @@ -1,49 +0,0 @@ -"""MIT License - -Copyright (c) 2019 David Luevano Alvarado - -Permission is hereby granted, free of charge, to any person obtaining a copy -of this software and associated documentation files (the "Software"), to deal -in the Software without restriction, including without limitation the rights -to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -copies of the Software, and to permit persons to whom the Software is -furnished to do so, subject to the following conditions: - -The above copyright notice and this permission notice shall be included in all -copies or substantial portions of the Software. - -THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE -SOFTWARE. -""" -import math -import numpy as np -from lj_matrix.frob_norm import frob_norm - - -def gauss_kernel(X_1, X_2, sigma): - """ - Calculates the Gaussian Kernel. - X_1: first representations. - X_2: second representations. - sigma: kernel width. - """ - x1_l = len(X_1) - x1_range = range(x1_l) - x2_l = len(X_2) - x2_range = range(x2_l) - - inv_sigma = -0.5 / (sigma*sigma) - - K = np.zeros((x1_l, x2_l)) - for i in x1_range: - for j in x2_range: - f_norm = frob_norm(X_1[i] - X_2[j]) - # print(f_norm) - K[i, j] = math.exp(inv_sigma * f_norm) - - return K |