matrix Archives - Petamind https://petaminds.com/tag/matrix/ A.I, Data and Software Engineering Tue, 05 Oct 2021 06:07:38 +0000 en-US hourly 1 https://wordpress.org/?v=6.9.4 https://petaminds.com/wp-content/uploads/2019/09/ic_launcher.png matrix Archives - Petamind https://petaminds.com/tag/matrix/ 32 32 Fast uniform negative sampling for rating matrix https://petaminds.com/fast-uniform-negative-sampling-for-rating-matrix/ https://petaminds.com/fast-uniform-negative-sampling-for-rating-matrix/#comments Fri, 21 Feb 2020 10:07:13 +0000 https://petaminds.com/?p=2250 Sometimes, we want to reduce the training time by using a subset of a very large dataset while the negative samples outnumbers the positive ones, e.g. word embedding. Another situation when we deal with implicit data. In this case, we may need to populate new data for negative values. This post demonstrates how to generate […]

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]]> https://petaminds.com/fast-uniform-negative-sampling-for-rating-matrix/feed/ 1 build a simple recommender system with matrix factorization https://petaminds.com/build-a-simple-recommender-system-with-matrix-factorization/ https://petaminds.com/build-a-simple-recommender-system-with-matrix-factorization/#comments Mon, 23 Dec 2019 23:13:25 +0000 https://petaminds.com/?p=2075 We will build a recommender system which recommends top n items for a user using the matrix factorization technique- one of the three most popular used recommender systems. matrix factorization Suppose we have a rating matrix of m users and n items. The rating of user to item is . Similar to PCA, matrix factorization […]

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]]> https://petaminds.com/build-a-simple-recommender-system-with-matrix-factorization/feed/ 3 Sparse Matrices for Machine Learning quick note https://petaminds.com/sparse-matrices-for-machine-learning-quick-note/ https://petaminds.com/sparse-matrices-for-machine-learning-quick-note/#respond Mon, 02 Dec 2019 14:18:00 +0000 https://petaminds.com/?p=1938 In machine learning, many matrices are sparse. It is essential to know how to handle this kind of matrix. Sparse vs Dense Matrix First, it is good to know that sparse matrix looks similar to a normal matrix, with rows, columns or other indexes. But a sparse matrix is comprised of mostly zero (0s) values. […]

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]]> https://petaminds.com/sparse-matrices-for-machine-learning-quick-note/feed/ 0 TF2.0 Warm-up exercises (forked from @chipHuyen Repo) https://petaminds.com/tf2-0-warm-up-exercises-forked-from-chiphuyen-repo/ https://petaminds.com/tf2-0-warm-up-exercises-forked-from-chiphuyen-repo/#comments Fri, 08 Nov 2019 01:54:24 +0000 https://petaminds.com/?p=1681 Heard of Ms @huyen chip for her notable yet controversial travelling books back in the day. I enjoy reading but I am not really into travel memoirs. Nevertheless, she did surprise everyone by her achievements by getting in Stanford, teaching TensorFlow, and then became a computer/data scientist. Her story is definitely very inspiring. For ones who […]

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