Get all the bulit-in functions used in R along with it's description and examples.
Function
Description
Example
print()
Prints its argument.
print("Hello, World!")
sum()
Computes the sum of a numeric vector.
sum(c(1, 2, 3))
mean()
Computes the mean of a numeric vector.
mean(c(1, 2, 3))
median()
Calculates the median of a numeric vector.
median(c(1, 2, 3, 4, 5))
var()
Calculates the variance of a numeric vector.
var(c(1, 2, 3, 4, 5))
length()
Returns the number of elements in a vector.
length(c(1, 2, 3))
seq()
Generates sequences of numbers.
seq(1, 10, by = 2)
rep()
Replicates elements in a vector.
rep(1, times = 3)
sqrt()
Computes the square root of a number.
sqrt(9)
paste()
Concatenates strings.
paste("Hello", "World")
str()
Displays the structure of an object.
str(iris)
class()
Returns the class of an object.
class(1:5)
max()
Returns the maximum value in a vector.
max(c(1, 2, 3))
min()
Returns the minimum value in a vector.
min(c(1, 2, 3))
round()
Rounds a numeric vector to the specified number of decimal places.
round(c(1.234, 2.567), 2)
sample()
Randomly samples from a vector.
sample(1:10, size = 3)
sort()
Sorts a vector in ascending order.
sort(c(3, 1, 2))
unique()
Returns unique elements in a vector.
unique(c(1, 2, 2, 3))
substring()
Extracts or replaces substrings in a character vector.
substring("hello", 2, 4)
tolower() / toupper()
Converts characters to lowercase/uppercase.
tolower("Hello")
summarize() (from the dplyr package)
Summarizes data frames.
summarize(df, mean_value = mean(column_name))
plot()
Creates various types of plots.
plot(x, y)
cos()
Computes the cosine of a numeric vector.
cos(c(0, pi/2, pi))
sin()
Computes the sine of a numeric vector.
sin(c(0, pi/2, pi))
log()
Computes the natural logarithm of a numeric vector.
log(c(1, 10, 100))
exp()
Computes the exponential function of a numeric vector.
exp(c(0, 1, 2))
cor()
Calculates the correlation coefficient between two numeric vectors.
cor(x, y)
quantile()
Calculates sample quantiles of a numeric vector.
quantile(c(1, 2, 3, 4, 5), probs = c(0.25, 0.75))
rev()
Reverses the order of elements in a vector.
rev(c(1, 2, 3))
any()
Checks if any element in a logical vector is true.
any(c(TRUE, FALSE, TRUE))
all()
Checks if all elements in a logical vector are true.
all(c(TRUE, TRUE, TRUE))
which()
Returns the indices of elements that are true in a logical vector.
which(c(TRUE, FALSE, TRUE))
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