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R Programming
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Terms in this set (213)
Vector
A one dimensional ordered variables of the same type.
Array
A multi-dimensional generalization of vectors.
List
An ordered collection of variables of possibly different types.
List Signature
An ordered list of variable types in the list.
Dataframe
An ordered collection of lists having the same list signature.
Declaring a Vector
A = c(1, 2, 3)
Simple Variable Assignment
a = 1
Variable assignment with pointer syntax
a <- 1
Multiple Variable Assignment on a Single Line
a = 1; b = 2; c = 3
Concatentation Function
c()
List all variables in memory
ls()
Remove a specific variable from memory
rm(a)
Remove all variables from memory
rm(list=ls())
Set working directory to '/'
setwd('/')
Show example of a function X
example(X)
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Verified questions
COMPUTER SCIENCE
What resources are used when a thread is created? How do they differ from those used when a process is created?
COMPUTER SCIENCE
Implement a class Moth that models a moth flying in a straight line. The moth has a position, the distance from a fixed origin. When the moth moves toward a point of light, its new position is halfway between its old position and the position of the light source. Supply a constructor def _ _ init _ _ (self, initialPosition) and methods - def moveToLight(self, lightPosition) - def getPosition(self) Your driver program should construct a moth, move it toward a couple of light sources, and check that the moth’s position is as expected.
COMPUTER SCIENCE
A(n) __________ is a piece of data that is sent into a function. a. argument b. parameter c. header d. packet
COMPUTER SCIENCE
When a function explicitly calls itself it is called _______________ recursion. a. explicit b. modal c. direct d. indirect
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