Go on. Explore!

lvl 0 • 0 xp

lvl 1

Home Market Decks Interests

R Programming Terms

memorize.ai (lvl 286)

(0)

39 cards

()

Section 1

Preview this deck

which

Front

1 / 39

R Programming Language

0.0

0 reviews

5			0
4			0
3			0
2			0
1			0

Active users

All-time users

Favorites

Last updated

7 years ago

Date created

Mar 1, 2020

Cards (39)

Section 1

(39 cards)

which

Front

can give you numbers greater or less than a certain number Ex: data= c(1,2,3,4,5,6) which(data < 5) =4,3,2,1

Back

sample()

Front

takes a sample of the specified size from the elements of x, either with or without replacement. Ex: sample(x, size=n, replace=FALSE, prob=c())

Back

mean

Front

average

Back

length(c(1,2,3))

Front

# of elements

Back

runif()

Front

produces x number of values between a min and a max Ex: runif(5, min=1, max=5)

Back

dataAfterRemoval

Front

removes data ex: dataAfterRemoval= data[(data>=2) & (data<=5)]

Back

paste

Front

paste( "animal", "foot", "butterfly", sep("-"))

Back

any

Front

asking if there are any true values in x

Back

v7=rep(c(1,2,3), times=3)

Front

repeat vector 3 times

Back

min

Front

smallest number in vector

Back

sort(data,decreasing=TRUE)

Front

sort data decreasing from biggest to smallest

Back

sum(c(1,2,3))

Front

sum of the included numbers

Back

v=seq(from=1, to=9, by=2s)

Front

1 to 9 by 2s

Back

MIN

Front

the excel function that calculates the smallest value in a range of cells

Back

sqrt(data)

Front

square root of data

Back

seq

Front

creates a sequence of numbers seq(from=1, to=5, length=6)

Back

SQRT

Front

the Excel function that calculates the square root

Back

COUNT

Front

counts the number of cells that contain numbers

Back

sample

Front

Back

?seq

Front

pulls up help on sequence function

Back

data(rivers)

Front

pulls data on rivers

Back

SUMSQ

Front

squares and then sums the values together

Back

v=c(1,2,3,4)

Front

vector

Back

SUMPRODUCT

Front

excel function for multiplying numbers together and then adding them

Back

prod(c(1,2,3))

Front

product of the included numbers

Back

V[4]

Front

what is the fourth element of vector v

Back

AVERAGE

Front

the Excel function that calculates the average value in a range of cells

Back

all

Front

Back

v8=rep(c(1,2,3), each=4)

Front

repeat each number in the vector individually 4 times

Back

MAX

Front

the Excel function that calculates the largest value in a range of cells

Back

max

Front

biggest numbering vector

Back

paste0

Front

same as paste but no spaces

Back

How to count the number of x in a vector

Front

countx=length(which(v==x)) countx

Back

char

Front

number of characters that make up a string of text

Back

rep

Front

repeat numbers in vector times= repeat the numbers x amount of times (1,2,3,1,2,3) each= repeat the numbers x amount of times individually (1,1,1,2,2,2,3,3,3)

Back

SUM

Front

the Excel function that calculates the sum

Back

choose(6,2)

Front

combination

Back

replicate()

Front

is a function that allows us to repeatedly evaluate an expression (which usually involves something being done "randomly", like the selection of a sample()). > replicate(n=20, sum(sample(1:6, size=2, replace=TRUE))) [1] 8 9 6 9 8 7 11 5 7 5 11 7 7 12 8 12 6 10 6 10

Back

v=1:9

Front

gives numbers 1 to 9 going up by 1

Back