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ggplot2 is an open-source data visualization package for the statistical programming language R.Created by Hadley Wickham in 2005, ggplot2 is an implementation of Leland Wilkinson's Grammar of Graphics—a general scheme for data visualization which breaks up graphs into semantic components such as scales and layers. ggplot2 can serve as a replacement for the base graphics in R and contains a ...
Word problem for context-sensitive language [35] Intersection emptiness for an unbounded number of regular languages [32] Regular Expression Star-Freeness [36] Equivalence problem for regular expressions [21] Emptiness problem for regular expressions with intersection. [21] Equivalence problem for star-free regular expressions with squaring. [21]
The first known PSPACE-complete problem was the word problem for deterministic context-sensitive grammars. In the word problem for context-sensitive grammars, one is given a set of grammatical transformations which can increase, but cannot decrease, the length of a sentence, and wishes to determine if a given sentence could be produced by these ...
Ultimately, the problem is more about having too much processed food, says Anton Bilchik, M.D., Ph.D., surgical oncologist, chief of medicine and director of the Gastrointestinal and Hepatobiliary ...
A woman who was brutally murdered in Queens more than three decades ago has finally been identified - through advanced DNA testing - as a mom who went missing soon after celebrating her daughter's ...
The FBI has arrested a student at George Mason University in Virginia for allegedly plotting a mass casualty attack on the Israeli consulate in New York, according to a federal court filing.
ggplot2 – for data visualization; dplyr – for wrangling and transforming data; tidyr – help transform data specifically into tidy data, where each variable is a column, each observation is a row; each row is an observation, and each value is a cell. readr – help read in common delimited, text files with data; purrr – a functional ...
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