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  2. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    Here the 'IEEE 754 double value' resulting of the 15 bit figure is 3.330560653658221E-15, which is rounded by Excel for the 'user interface' to 15 digits 3.33056065365822E-15, and then displayed with 30 decimals digits gets one 'fake zero' added, thus the 'binary' and 'decimal' values in the sample are identical only in display, the values ...

  3. Row and column spaces - Wikipedia

    en.wikipedia.org/wiki/Row_and_column_spaces

    Thus A T x = 0 if and only if x is orthogonal (perpendicular) to each of the column vectors of A. It follows that the left null space (the null space of A T) is the orthogonal complement to the column space of A. For a matrix A, the column space, row space, null space, and left null space are sometimes referred to as the four fundamental subspaces.

  4. Entity–attribute–value model - Wikipedia

    en.wikipedia.org/wiki/Entity–attribute–value...

    In an EAV data model, each attribute–value pair is a fact describing an entity, and a row in an EAV table stores a single fact. EAV tables are often described as "long and skinny": "long" refers to the number of rows, "skinny" to the few columns. Data is recorded as three columns: The entity: the item being described.

  5. Exploratory factor analysis - Wikipedia

    en.wikipedia.org/wiki/Exploratory_factor_analysis

    If m ≥ 4, all pairs of columns should have several rows with zeros in both columns; All pairs of columns should have few rows with non-zero loadings in both columns (i.e., there should be few items with cross-loadings) There are two main types of factor rotation: orthogonal and oblique rotation.

  6. Braille pattern dots-0 - Wikipedia

    en.wikipedia.org/wiki/Braille_pattern_dots-0

    In all braille systems, the braille pattern dots-0 is used to represent a space or the lack of content. [1] In particular some fonts display the character as a fixed-width blank. However, the Unicode standard explicitly states that it does not act as a space, [2] a statement added in response to a comment that it should be treated as a space. [3]

  7. Zero-width space - Wikipedia

    en.wikipedia.org/wiki/Zero-width_space

    The zero-width space can be used to mark word breaks in languages without visible space between words, such as Thai, Myanmar, Khmer, and Japanese. [ 1 ] In justified text, the rendering engine may add inter-character spacing, also known as letter spacing, between letters separated by a zero-width space, unlike around fixed-width spaces.

  8. Data cube - Wikipedia

    en.wikipedia.org/wiki/Data_cube

    In computer programming contexts, a data cube (or datacube) is a multi-dimensional ("n-D") array of values. Typically, the term data cube is applied in contexts where these arrays are massively larger than the hosting computer's main memory; examples include multi-terabyte/petabyte data warehouses and time series of image data.

  9. Status bar - Wikipedia

    en.wikipedia.org/wiki/Status_bar

    The status bar of a file manager often shows the count of items in the current directory, their total size, or the size of the currently selected item.; The status bar of a web browser will be invisible or blank when the user is viewing a page, then display loading information when the user clicks a hyperlink.