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  2. pandas (software) - Wikipedia

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

    [4]: 112 Series can be used arithmetically, as in the statement series_3 = series_1 + series_2: this will align data points with corresponding index values in series_1 and series_2, then add them together to produce new values in series_3. [4]: 114 A DataFrame is a 2-dimensional data structure of rows and columns, similar to a spreadsheet, and ...

  3. Row and column vectors - Wikipedia

    en.wikipedia.org/wiki/Row_and_column_vectors

    The transpose (indicated by T) of any row vector is a column vector, and the transpose of any column vector is a row vector: […] = [] and [] = […]. The set of all row vectors with n entries in a given field (such as the real numbers ) forms an n -dimensional vector space ; similarly, the set of all column vectors with m entries forms an m ...

  4. Row- and column-major order - Wikipedia

    en.wikipedia.org/wiki/Row-_and_column-major_order

    Even though the row is indicated by the first index and the column by the second index, no grouping order between the dimensions is implied by this. The choice of how to group and order the indices, either by row-major or column-major methods, is thus a matter of convention. The same terminology can be applied to even higher dimensional arrays.

  5. Determining the number of clusters in a data set - Wikipedia

    en.wikipedia.org/wiki/Determining_the_number_of...

    The average silhouette of the data is another useful criterion for assessing the natural number of clusters. The silhouette of a data instance is a measure of how closely it is matched to data within its cluster and how loosely it is matched to data of the neighboring cluster, i.e., the cluster whose average distance from the datum is lowest. [8]

  6. Best Black Friday handbag & purse deals you can still shop ...

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    'Tis the season for spoiling! During a big shopping event like this Black Friday weekend, it's a great time to shop for luxury items you might not always splurge on.

  7. Brett Favre responds to viral video of confrontation with ...

    www.aol.com/brett-favre-responds-viral-video...

    Strahan's sack on the play was what allowed him to surpass the 22-sack mark Gastineau had set in 1984. "I'm gonna get my sack back," the former Jets defender says in the video. "I'm gonna get my ...

  8. Data set - Wikipedia

    en.wikipedia.org/wiki/Data_set

    Various plots of the multivariate data set Iris flower data set introduced by Ronald Fisher (1936). [1]A data set (or dataset) is a collection of data.In the case of tabular data, a data set corresponds to one or more database tables, where every column of a table represents a particular variable, and each row corresponds to a given record of the data set in question.

  9. Jenna, Savannah and Sheinelle share sweet photos of their ...

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    Jenna Bush Hager, Savannah Guthrie, Sheinelle Jones and their kids celebrated the holidays together at a recent party at the White House.