November 2017
Intermediate to advanced
374 pages
10h 19m
English
Content preview from scikit-learn Cookbook , Second Edition - Second Edition
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Sign flipping
There's a gotcha with truncated SVDs. Depending on the state of the random number generator, successive fittings of truncated SVD can flip the signs of the output. In order to avoid this, it's advisable to fit truncated SVD once, and then use transforms from then on. This is another good reason for pipelines!
To carry this out, do the following:
tsvd = TruncatedSVD(2)tsvd.fit(iris_X)tsvd.transform(iris_X)
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.