Use TruncatedSVD instead of PCA

[cyrillustan]

No description provided.

[codecov]

Codecov Report

Merging #22 (c367db7) into main (10bc75f) will decrease coverage by 2.23%.
The diff coverage is 20.33%.

@@            Coverage Diff             @@
##             main      #22      +/-   ##
==========================================
- Coverage   64.41%   62.17%   -2.24%     
==========================================
  Files           7        8       +1     
  Lines         503      542      +39     
==========================================
+ Hits          324      337      +13     
- Misses        179      205      +26     

Flag	Coverage Δ
unittests	62.17% <20.33%> (-2.24%)	⬇️

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Impacted Files	Coverage Δ
tensorpack/plot.py	0.00% <0.00%> (ø)
tensorpack/test/atyeo.py	0.00% <0.00%> (ø)
tensorpack/decomposition.py	36.66% <36.66%> (ø)
tensorpack/__init__.py	100.00% <100.00%> (ø)
tensorpack/test/test_cmtf.py	98.50% <0.00%> (+1.49%)	⬆️

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