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  2. pandas (software) - Wikipedia

    en.wikipedia.org/wiki/Pandas_(software)

    As such, a DataFrame can be thought of as having two indices: one column-based and one row-based. Because column names are stored as an index, these are not required to be unique. [9]: 103–105 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 ...

  3. Quickselect - Wikipedia

    en.wikipedia.org/wiki/Quickselect

    Quickselect uses the same overall approach as quicksort, choosing one element as a pivot and partitioning the data in two based on the pivot, accordingly as less than or greater than the pivot. However, instead of recursing into both sides, as in quicksort, quickselect only recurses into one side – the side with the element it is searching for.

  4. Pivot table - Wikipedia

    en.wikipedia.org/wiki/Pivot_table

    A pivot table is a table of values which are aggregations of groups of individual values from a more extensive table (such as from a database, spreadsheet, or business intelligence program) within one or more discrete categories. The aggregations or summaries of the groups of the individual terms might include sums, averages, counts, or other ...

  5. Selection algorithm - Wikipedia

    en.wikipedia.org/wiki/Selection_algorithm

    As a baseline algorithm, selection of the th smallest value in a collection of values can be performed by the following two steps: . Sort the collection; If the output of the sorting algorithm is an array, retrieve its th element; otherwise, scan the sorted sequence to find the th element.

  6. Damian Williams, Manhattan's top federal prosecutor, to ... - AOL

    www.aol.com/news/damian-williams-manhattans-top...

    NEW YORK (Reuters) -Damian Williams, the top federal prosecutor in Manhattan who secured convictions of high-profile defendants including U.S. Senator Bob Menendez and crypto mogul Sam Bankman ...

  7. Shop the best QVC Black Friday sales — including Oprah's ...

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    It's also cruelty-free and available in four different tones to suit your skin color. Includes five matte eye shadows, five brow shades, two lip and cheek creams, a highlighter, and two powder ...

  8. You Need to Check the Label of Your Parmesan Cheese ASAP - AOL

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    How can I find the real stuff at the grocery store? Luckily it’s fairly easy to spot Parmigiano Reggiano IRL — if you know where to look: Check the label: First, make sure the product is ...

  9. Pivotal quantity - Wikipedia

    en.wikipedia.org/wiki/Pivotal_quantity

    The function (,) is the Student's t-statistic for a new value , to be drawn from the same population as the already observed set of values . Using x = μ {\displaystyle x=\mu } the function g ( μ , X ) {\displaystyle g(\mu ,X)} becomes a pivotal quantity, which is also distributed by the Student's t-distribution with ν = n − 1 ...

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