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David H
  • Member for 10 years, 1 month
  • Last seen more than 2 years ago
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Why do we need to normalize data before principal component analysis (PCA)?
Sep 4, 2013
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How to improve the efficiency of an estimator when the estimates significantly vary among subgroups?
Dec 21, 2016
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Animated Wave propagation using split operator method
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ParametricPlot with plot markers

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