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  2. pandas (software) - Wikipedia

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

    [4]: 112 Series can be used arithmetically, as in the statement series_3 = series_1 + series_2: this will align data points with corresponding index values in series_1 and series_2, then add them together to produce new values in series_3. [4]: 114 A DataFrame is a 2-dimensional data structure of rows and columns, similar to a spreadsheet, and ...

  3. Wide and narrow data - Wikipedia

    en.wikipedia.org/wiki/Wide_and_narrow_data

    Many statistical and data processing systems have functions to convert between these two presentations, for instance the R programming language has several packages such as the tidyr package. The pandas package in Python implements this operation as "melt" function which converts a wide table to a narrow one. The process of converting a narrow ...

  4. Disjoint-set data structure - Wikipedia

    en.wikipedia.org/wiki/Disjoint-set_data_structure

    To merge trees with roots x and y, first compare their ranks. If the ranks are different, then the larger rank tree becomes the parent, and the ranks of x and y do not change. If the ranks are the same, then either one can become the parent, but the new parent's rank is incremented by one.

  5. Merge algorithm - Wikipedia

    en.wikipedia.org/wiki/Merge_algorithm

    In the merge sort algorithm, this subroutine is typically used to merge two sub-arrays A[lo..mid], A[mid+1..hi] of a single array A. This can be done by copying the sub-arrays into a temporary array, then applying the merge algorithm above. [1] The allocation of a temporary array can be avoided, but at the expense of speed and programming ease.

  6. Columbia group's antisemitic newspaper draws outrage from NY ...

    www.aol.com/news/columbia-groups-antisemitic...

    "When I see stuff like that, the title, ‘Myth of the Two-State Solution,’ these people don’t want peace," Brooke Chasalow, 20, said. Another student who refused to provide her identity said ...

  7. Bitemporal modeling - Wikipedia

    en.wikipedia.org/wiki/Bitemporal_Modeling

    Bitemporal modeling is a specific case of temporal database information modeling technique designed to handle historical data along two different timelines. [1] This makes it possible to rewind the information to "as it actually was" in combination with "as it was recorded" at some point in time.

  8. Trainers Say This Easy Move Will Reverse The Damage Of ...

    www.aol.com/lifestyle/trainers-easy-move-reverse...

    Sitting all day has been linked to a slew of health issues, including cardiovascular disease and type 2 diabetes. It can also mess with your muscles and mobility over time. It can also mess with ...

  9. Couple Accused of Faking 6-Year-Old Son's Cancer, Raising ...

    www.aol.com/lifestyle/couple-accused-faking-6...

    The officer alleged that the couple had been requesting monetary donations through a GoFundMe page and word of mouth, to fund their 6-year-old son's medical treatment.