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If data is a Series, then data['a'] returns all values with the index value of a. However, if data is a DataFrame, then data['a'] returns all values in the column(s) named a. To avoid this ambiguity, Pandas supports the syntax data.loc['a'] as an alternative way to filter using the index. Pandas also supports the syntax data.iloc[n], which ...
Typically, grouping is used to apply some sort of aggregate function for each group. [1] [2] The result of a query using a GROUP BY statement contains one row for each group. This implies constraints on the columns that can appear in the associated SELECT clause. As a general rule, the SELECT clause may only contain columns with a unique value ...
Note that winsorizing is not equivalent to simply excluding data, which is a simpler procedure, called trimming or truncation, but is a method of censoring data.. In a trimmed estimator, the extreme values are discarded; in a winsorized estimator, the extreme values are instead replaced by certain percentiles (the trimmed minimum and maximum).
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British luxury automaker Jaguar has revealed its Type 00 concept car, the first glimpse of a new electric vehicle following a controversial rebrand that has divided opinion on social media.
The Mackey J. McDonald Stock Index From January 2009 to October 2012, if you bought shares in companies when Mackey J. McDonald joined the board, and sold them when he left, you would have a 41.6 percent return on your investment, compared to a 55.0 percent return from the S&P 500.
The Kathi P. Seifert Stock Index From January 2008 to December 2012, if you bought shares in companies when Kathi P. Seifert joined the board, and sold them when she left, you would have a -93.4 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
The Rex W. Tillerson Stock Index From January 2008 to December 2012, if you bought shares in companies when Rex W. Tillerson joined the board, and sold them when he left, you would have a -8.1 percent return on your investment, compared to a -2.8 percent return from the S&P 500.