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  2. Matrix completion - Wikipedia

    en.wikipedia.org/wiki/Matrix_completion

    Since the columns belong to a union of subspaces, the problem may be viewed as a missing-data version of the subspace clustering problem. Let X {\displaystyle X} be an n × N {\displaystyle n\times N} matrix whose (complete) columns lie in a union of at most k {\displaystyle k} subspaces, each of r a n k ≤ r < n {\displaystyle rank\leq r<n ...

  3. Selection algorithm - Wikipedia

    en.wikipedia.org/wiki/Selection_algorithm

    As a baseline algorithm, selection of the th smallest value in a collection of values can be performed by the following two steps: . Sort the collection; If the output of the sorting algorithm is an array, retrieve its th element; otherwise, scan the sorted sequence to find the th element.

  4. Missing data - Wikipedia

    en.wikipedia.org/wiki/Missing_data

    Generally speaking, there are three main approaches to handle missing data: (1) Imputation—where values are filled in the place of missing data, (2) omission—where samples with invalid data are discarded from further analysis and (3) analysis—by directly applying methods unaffected by the missing values. One systematic review addressing ...

  5. Data analysis - Wikipedia

    en.wikipedia.org/wiki/Data_analysis

    Data collection or data gathering is the process of gathering and measuring information on targeted variables in an established system, which then enables one to answer relevant questions and evaluate outcomes. The data may also be collected from sensors in the environment, including traffic cameras, satellites, recording devices, etc.

  6. List of commercial failures in computing - Wikipedia

    en.wikipedia.org/wiki/List_of_commercial...

    Initially retailed for less than $750 (equivalent to $2,294 in 2023), it was a complete low-cost system that shipped with a 75-key typewriter-style keyboard, a daisy-wheel printer, one drive for a class of proprietary data cassettes called Digital Data Packs with the option of a second, a Zilog Z80A as its main processor, and 80 KB of RAM ...

  7. 2000 United States presidential election - Wikipedia

    en.wikipedia.org/wiki/2000_United_States...

    This was the last time until 2024 in which an incumbent vice president ran for president. This was also the last time a Republican received an electoral vote from New England until 2016 . This and the 2004 presidential election were the only ones between 1980 and 2024 in which the winner received fewer than 300 electoral votes (less than 55% of ...

  8. World Wide Web - Wikipedia

    en.wikipedia.org/wiki/World_Wide_Web

    The web browser then initiates a series of background communication messages to fetch and display the requested page. In the 1990s, using a browser to view web pages—and to move from one web page to another through hyperlinks—came to be known as 'browsing,' 'web surfing' (after channel surfing), or 'navigating the Web'. Early studies of ...

  9. List of Super Bowl commercials - Wikipedia

    en.wikipedia.org/wiki/List_of_Super_Bowl_commercials

    A group of cowboys round up a heard of horses. After getting the job done, they all relax and enjoy a can of Lone Star Beer. Pabst Blue Ribbon "Highwheelers" A group of men ride on vintage high wheel bicycles through a park. The narrator connects this to the old-time taste of Pabst Blue Ribbon beer. Car Ford "What You Want"