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  2. Array slicing - Wikipedia

    en.wikipedia.org/wiki/Array_slicing

    Common examples of array slicing are extracting a substring from a string of characters, the "ell" in "hello", extracting a row or column from a two-dimensional array, or extracting a vector from a matrix. Depending on the programming language, an array slice can be made out of non-consecutive elements.

  3. Template:Columns-list - Wikipedia

    en.wikipedia.org/wiki/Template:Columns-list

    Template:Columns-list turns a list into a list with columns. It is a wrapper for {{ div col }} , except it wraps the template by allowing for the content to be in the template rather than above and below.

  4. Row and column spaces - Wikipedia

    en.wikipedia.org/wiki/Row_and_column_spaces

    The column space of a matrix is the image or range of the corresponding matrix transformation. Let be a field. The column space of an m × n matrix with components from is a linear subspace of the m-space. The dimension of the column space is called the rank of the matrix and is at most min(m, n). [1]

  5. Matrix splitting - Wikipedia

    en.wikipedia.org/wiki/Matrix_splitting

    In the mathematical discipline of numerical linear algebra, a matrix splitting is an expression which represents a given matrix as a sum or difference of matrices. Many iterative methods (for example, for systems of differential equations) depend upon the direct solution of matrix equations involving matrices more general than tridiagonal matrices.

  6. Principal component analysis - Wikipedia

    en.wikipedia.org/wiki/Principal_component_analysis

    Principal component analysis (PCA) is a linear dimensionality reduction technique with applications in exploratory data analysis, visualization and data preprocessing.. The data is linearly transformed onto a new coordinate system such that the directions (principal components) capturing the largest variation in the data can be easily identified.

  7. Wikipedia:Unusual articles - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:Unusual_articles

    Each entry on this list should be an article on its own (not merely a section in a less unusual article) and of decent quality, and in large meeting Wikipedia's manual of style. For unusual contributions that are of greater levity, see Wikipedia:Silly Things. In this list, a star indicates a featured article. A plus indicates a good article.

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  9. Elephant - Wikipedia

    en.wikipedia.org/wiki/Elephant

    In addition, the ventricles of the heart split towards the top, a trait also found in sirenians. [82] When upright, the elephant's heart beats around 28 beats per minute and actually speeds up to 35 beats when it lies down. [79] The blood vessels are thick and wide and can hold up under high blood pressure. [82]