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pandas data structure Series: one-dimension array, similar to python list, but only can storage same type of data. Time-Series: index as time series. 阅读全文
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#Python for cyber novel web crawler ##Package in use urllib, BeautifulSoup urllib is a build-in package in Python and the most useful childpackage is 阅读全文
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#原文:Principal component analysis: a review and recent development. 本文只是简单提炼要点,如果没有线性代数基础建议阅读原文。 链接:https://doi.org/10.1098/rsta.2015.0202 ##背景和基本方法 PC 阅读全文