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  2. pandas (software) - Wikipedia

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

    Pandas' syntax for mapping index values to relevant data is the same syntax Python uses to map dictionary keys to values. For example, if s is a Series, s['a'] will return the data point at index a. Unlike dictionary keys, index values are not guaranteed to be unique.

  3. Unimodality - Wikipedia

    en.wikipedia.org/wiki/Unimodality

    The Chebyshev inequality guarantees that in any probability distribution, "nearly all" the values are "close to" the mean value. The Vysochanskiï–Petunin inequality refines this to even nearer values, provided that the distribution function is continuous and unimodal. Further results were shown by Sellke and Sellke. [9]

  4. Table (database) - Wikipedia

    en.wikipedia.org/wiki/Table_(database)

    In a database, a table is a collection of related data organized in table format; consisting of columns and rows.. In relational databases, and flat file databases, a table is a set of data elements (values) using a model of vertical columns (identifiable by name) and horizontal rows, the cell being the unit where a row and column intersect. [1]

  5. Element distinctness problem - Wikipedia

    en.wikipedia.org/wiki/Element_distinctness_problem

    If the elements in the problem are real numbers, the decision-tree lower bound extends to the real random-access machine model with an instruction set that includes addition, subtraction and multiplication of real numbers, as well as comparison and either division or remaindering ("floor"). [5]

  6. 9 Rare American Coins That Are Worth a Lot of Money - AOL

    www.aol.com/finance/9-rare-american-coins-worth...

    You can find these pennies selling for hundreds to thousands of dollars on eBay, but one of the pricier coins in mint condition sold for $159,000. 1925-D Lincoln Penny: $21,600+

  7. I traveled to 50 of the top countries for tourism and ranked ...

    www.aol.com/traveled-50-top-countries-tourism...

    When I visited in 2008, I couldn't find much for tourists to do. Nowadays, I've heard the country is bustling with tourism, music festivals , unique desert and overwater stays, fashion boutiques ...

  8. The Best Small-Cap ETF to Buy Right Now (and One ... - AOL

    www.aol.com/best-small-cap-etf-buy-114500581.html

    ^SPX data by YCharts.. The ETF combines Vanguard's trademark low costs with a 0.07% expense ratio and minimal turnover at 16%. With an average daily trading volume of approximately 455,000 shares ...

  9. Word2vec - Wikipedia

    en.wikipedia.org/wiki/Word2vec

    Word2vec is a group of related models that are used to produce word embeddings.These models are shallow, two-layer neural networks that are trained to reconstruct linguistic contexts of words.