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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 ]
Dundas Data Visualization (formerly Dundas Software) was founded in 1992 in Toronto, Ontario, Canada.. After an early success with Dundas Chart in 2002, the company developed Dundas Gauge, Map, OLAP Chart, and Calendar controls, which were purchased by Microsoft in 2007 to become part of their Reporting Services, SharePoint, and .NET offerings.
The MIT Blackjack Team was a group of students and ex-students. The students were from Massachusetts Institute of Technology, Harvard University, and other leading colleges; they used card counting techniques and more sophisticated strategies to beat casinos at blackjack worldwide. The team and its successors operated successfully from 1979 ...
A counting process is a stochastic process {N(t), t ≥ 0} with values that are non-negative, integer, and non-decreasing: N(t) ≥ 0. N(t) is an integer. If s ≤ t then N(s) ≤ N(t). If s < t, then N(t) − N(s) is the number of events occurred during the interval (s, t]. Examples of counting processes include Poisson processes and Renewal ...
The p-chart models "pass"/"fail"-type inspection only, while the c-chart (and u-chart) give the ability to distinguish between (for example) 2 items which fail inspection because of one fault each and the same two items failing inspection with 5 faults each; in the former case, the p-chart will show two non-conformant items, while the c-chart ...
A chart of accounts (COA) is a list of financial accounts and reference numbers, grouped into categories, such as assets, liabilities, equity, revenue and expenses, and used for recording transactions in the organization's general ledger. Accounts may be associated with an identifier (account number) and a caption or header and are coded by ...
Tally marks, also called hash marks, are a form of numeral used for counting. They can be thought of as a unary numeral system. They are most useful in counting or tallying ongoing results, such as the score in a game or sport, as no intermediate results need to be erased or discarded. However, because of the length of large numbers, tallies ...
For matchings that are not required to be perfect, counting them remains #P-complete even for planar graphs. The key idea of the FKT algorithm is to convert the problem into a Pfaffian computation of a skew-symmetric matrix derived from a planar embedding of the graph.