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  2. pandas (software) - Wikipedia

    en.wikipedia.org/wiki/Pandas_(software)

    However, if data is a DataFrame, then data['a'] returns all values in the column(s) named a. To avoid this ambiguity, Pandas supports the syntax data.loc['a'] as an alternative way to filter using the index. Pandas also supports the syntax data.iloc[n], which always takes an integer n and returns the nth value, counting from 0. This allows a ...

  3. Algorithms for calculating variance - Wikipedia

    en.wikipedia.org/wiki/Algorithms_for_calculating...

    Algorithms for calculating variance play a major role in computational statistics.A key difficulty in the design of good algorithms for this problem is that formulas for the variance may involve sums of squares, which can lead to numerical instability as well as to arithmetic overflow when dealing with large values.

  4. NaN - Wikipedia

    en.wikipedia.org/wiki/NaN

    In computing, NaN (/ n æ n /), standing for Not a Number, is a particular value of a numeric data type (often a floating-point number) which is undefined as a number, such as the result of 0/0.

  5. Panel data - Wikipedia

    en.wikipedia.org/wiki/Panel_data

    Another way to structure panel data would be the wide format where one row represents one observational unit for all points in time (for the example, the wide format would have only two (first example) or three (second example) rows of data with additional columns for each time-varying variable (income, age).

  6. Catholic Church in Sichuan - Wikipedia

    en.wikipedia.org/wiki/Catholic_Church_in_Sichuan

    The presence of the Catholic Church in the southwestern Chinese province of Sichuan [b] and city of Chongqing [c] dates back to 1640, when two missionaries, Lodovico Buglio and Gabriel de Magalhães, through Jesuit missions in China, entered the province and spent much of the 1640s evangelizing in Chengdu and its surrounding areas. [6]

  7. Sikkim - Wikipedia

    en.wikipedia.org/wiki/Sikkim

    Sikkim (/ ˈ s ɪ k ɪ m / SIK-im; Nepali:) is a state in northeastern India.It borders the Tibet Autonomous Region of China in the north and northeast, Bhutan in the east, Koshi Province of Nepal in the west, and West Bengal in the south.

  8. CAPTCHA - Wikipedia

    en.wikipedia.org/wiki/Captcha

    This CAPTCHA (reCAPTCHA v1) of "smwm" obscures its message from computer interpretation by twisting the letters and adding a slight background color gradient.A CAPTCHA (/ ˈ k æ p. tʃ ə / KAP-chə) is a type of challenge–response test used in computing to determine whether the user is human in order to deter bot attacks and spam.

  9. Wikipedia:WikiProject Women/Did you know - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:WikiProject...

    This is a list of recognized content, updated weekly by JL-Bot (talk · contribs) (typically on Saturdays).There is no need to edit the list yourself. If an article is missing from the list, make sure it is tagged (e.g. {{WikiProject Women}}) or categorized correctly and wait for the next update.