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Data structures for statistical computing in Python - SciPy Conferences

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Categorical data and “Group by”<br />

Often want to compute descriptive stats on data given group designations:<br />

>>> s >>> cats<br />

<strong>in</strong>dustry<br />

AAPL 0.044 AAPL TECH<br />

IBM 0.050 IBM TECH<br />

SAP 0.101 SAP TECH<br />

GOOG 0.113 GOOG TECH<br />

C 0.138 C FIN<br />

SCGLY 0.037 SCGLY FIN<br />

BAR 0.200 BAR FIN<br />

DB 0.281 DB FIN<br />

VW 0.040 VW AUTO<br />

RNO AUTO<br />

F AUTO<br />

TM AUTO<br />

McK<strong>in</strong>ney () Statistical <strong>Data</strong> Structures <strong>in</strong> <strong>Python</strong> <strong>SciPy</strong> 2010 19 / 31

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