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  2. dplyr - Wikipedia

    en.wikipedia.org/wiki/Dplyr

    While dplyr actually includes several dozen functions that enable various forms of data manipulation, the package features five primary verbs or actions: [6] filter(), which is used to extract rows from a dataframe, based on conditions specified by a user; select(), which is used to subset a dataframe by its columns;

  3. Array slicing - Wikipedia

    en.wikipedia.org/wiki/Array_slicing

    In programming languages that use a 0-based indexing scheme, the slice would be from index 2 to 5. Reducing the range of any index to a single value effectively eliminates that index. This feature can be used, for example, to extract one-dimensional slices (vectors: in 3D, rows, columns, and tubes [ 1 ] ) or two-dimensional slices (rectangular ...

  4. Row- and column-major order - Wikipedia

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

    To use column-major order in a row-major environment, or vice versa, for whatever reason, one workaround is to assign non-conventional roles to the indexes (using the first index for the column and the second index for the row), and another is to bypass language syntax by explicitly computing positions in a one-dimensional array.

  5. Remains found in 1973 identified as Pennsylvania teen girl ...

    www.aol.com/news/remains-found-1973-identified...

    Officials have positively identified the remains of a girl whose body was found hidden in brush under a plastic tarp in 1973, Pennsylvania authorities said this week.

  6. 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]

  7. Some Costco eggs are recalled due to risk of salmonella - AOL

    www.aol.com/costco-eggs-recalled-due-risk...

    Some Costco eggs sold under the Kirkland Signature brand are being recalled due to the risk of salmonella, according to a notice from the U.S. Food and Drug Administration. The Kirkland Signature ...

  8. Hyundai, Kia recall over 208,000 electric vehicles to fix ...

    www.aol.com/hyundai-kia-recall-over-208...

    Hyundai and Kia are recalling over 208,000 electric vehicles to fix a pesky problem that can cause loss of drive power, increasing the risk of a crash. The recalls cover more than 145,000 Hyundai ...

  9. Array programming - Wikipedia

    en.wikipedia.org/wiki/Array_programming

    Function rank is an important concept to array programming languages in general, by analogy to tensor rank in mathematics: functions that operate on data may be classified by the number of dimensions they act on. Ordinary multiplication, for example, is a scalar ranked function because it operates on zero-dimensional data (individual numbers).