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  2. Python syntax and semantics - Wikipedia

    en.wikipedia.org/wiki/Python_syntax_and_semantics

    Python sets are very much like mathematical sets, and support operations like set intersection and union. Python also features a frozenset class for immutable sets, see Collection types. Dictionaries (class dict) are mutable mappings tying keys and corresponding values. Python has special syntax to create dictionaries ({key: value})

  3. Marginal distribution - Wikipedia

    en.wikipedia.org/wiki/Marginal_distribution

    Given a known joint distribution of two discrete random variables, say, X and Y, the marginal distribution of either variable – X for example – is the probability distribution of X when the values of Y are not taken into consideration. This can be calculated by summing the joint probability distribution over all values of Y.

  4. Dollar sign - Wikipedia

    en.wikipedia.org/wiki/Dollar_sign

    The dollar sign, also known as the peso sign, is a currency symbol consisting of a capital S crossed with one or two vertical strokes ($ or depending on typeface), used to indicate the unit of various currencies around the world, including most currencies denominated "dollar" or "peso".

  5. Cluster analysis - Wikipedia

    en.wikipedia.org/wiki/Cluster_analysis

    Graph-based model s: a clique, that is, a subset of nodes in a graph such that every two nodes in the subset are connected by an edge can be considered as a prototypical form of cluster. Relaxations of the complete connectivity requirement (a fraction of the edges can be missing) are known as quasi-cliques, as in the HCS clustering algorithm .

  6. Data analysis - Wikipedia

    en.wikipedia.org/wiki/Data_analysis

    Analytics is the "extensive use of data, statistical and quantitative analysis, explanatory and predictive models, and fact-based management to drive decisions and actions." It is a subset of business intelligence , which is a set of technologies and processes that uses data to understand and analyze business performance to drive decision-making .

  7. Total sum of squares - Wikipedia

    en.wikipedia.org/wiki/Total_sum_of_squares

    In statistical data analysis the total sum of squares (TSS or SST) is a quantity that appears as part of a standard way of presenting results of such analyses.For a set of observations, ,, it is defined as the sum over all squared differences between the observations and their overall mean ¯.: [1]

  8. LibreOffice - Wikipedia

    en.wikipedia.org/wiki/LibreOffice

    Queries and filters using some text-based operations such as 'contains' now properly work even with numeric data. Quick find allowed to search for values instead of formulas. Impress & Draw. New screen sizes compatible with PowerPoint. Core / General. New options to generate one-dimensional barcodes. New WebDAV/HTTP UCP based on libcurl.

  9. Python (codename) - Wikipedia

    en.wikipedia.org/wiki/Python_(codename)

    Each dispersed Python group would be supported by dispersed sections of the United Kingdom Supply Agency and the National Air Transport Agency. In addition, in 1964 the Secretary of State for Scotland ordered three ships – MV Hebrides , MV Clansman and RMS Columba – which were chartered to David MacBrayne as car ferries but could be ...