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dplyr is an R package whose set of functions are designed to enable dataframe (a spreadsheet-like data structure) manipulation in an intuitive, user-friendly way. It is one of the core packages of the popular tidyverse set of packages in the R programming language . [ 1 ]
Each ij cell, then, is the number of times word j occurs in document i. As such, each row is a vector of term counts that represents the content of the document corresponding to that row. For instance if one has the following two (short) documents: D1 = "I like databases" D2 = "I dislike databases", then the document-term matrix would be:
In Lua, "table" is a fundamental type that can be used either as an array (numerical index, fast) or as an associative array. The keys and values can be of any type, except nil. The following focuses on non-numerical indexes. A table literal is written as { value, key = value, [index] = value, ["non id string"] = value }. For example:
The terms data dictionary and data repository indicate a more general software utility than a catalogue. A catalogue is closely coupled with the DBMS software. It provides the information stored in it to the user and the DBA, but it is mainly accessed by the various software modules of the DBMS itself, such as DDL and DML compilers, the query optimiser, the transaction processor, report ...
In computer science, a trie (/ ˈ t r aɪ /, / ˈ t r iː /), also known as a digital tree or prefix tree, [1] is a specialized search tree data structure used to store and retrieve strings from a dictionary or set.
For each n > 1, the dicyclic group Dic n is a non-abelian group of order 4n. (For the degenerate case n = 1, the group Dic 1 is the cyclic group C 4, which is not considered dicyclic.) Let A = a be the subgroup of Dic n generated by a. Then A is a cyclic group of order 2n, so [Dic n:A] = 2. As a subgroup of index 2 it is automatically a normal ...
The Abridged edition came out in 1756 in two octavo volumes with entries, "abstracted from the folio edition by the author", [43] laid out as two columns per page. The abridged version did not feature the literary quotes, just the author quoted. This made it cheaper to produce and buy.
The advanced learner's dictionary is the most common type of monolingual learner's dictionary, that is, a dictionary written in one language only, for someone who is learning a foreign language. It differs from a bilingual or translation dictionary, a standard dictionary written for native speakers , or a children's dictionary.