Get Help in R Environment

Q

How to get help in R environment?

✍: FYIcenter.com

A

You can use the help() function to get help in R environment.

1. Get help on the help() function:

> help(help)

help is the primary interface to the help systems.

Usage

help(topic, package = NULL, lib.loc = NULL,
     verbose = getOption("verbose"),
     try.all.packages = getOption("help.try.all.packages"),
     help_type = getOption("help_type"))
...

2. Get help on print() function:

> help(print)

print prints its argument and returns it invisibly (via invisible(x)).

Usage

print(x, ...)
...

3. Get help on "cars" data frame:

> help(cars)

The data give the speed of cars and the distances taken to stop. Note that
the data were recorded in the 1920s.

Usage

cars
...

⇒ Built-in Graphics Package in R Environment

⇐ Data Frame Example - "cars"

⇑ R Language Basics

⇑⇑ R Software Environment - Frequently Asked Questions

2023-05-31, ∼1371🔥, 0💬

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What is data structure "List"? List is a special vector whose members are all lists. 1. Create a list object with the list() function - > w = list( c(1,2,3), c("Apple", "Banana", "Orange")) > w [[1]] [1] 1 2 3 [[2]] [1] "Apple" "Banana" "Orange" > is.list(w) [1] TRUE > is... 2023-06-11, ∼1666🔥, 0💬

Data Structure - Factor
What is a Factor? A factor is a data structure that stores a vector and its distinct values as categories. 1. Create a factor object with the factor() function - > f = factor( c("Bike", "Car", "Truck", "Car", "Bike", "Truck") ) > f [1] Bike Car Truck Car Bike Truck Levels: Bike Car Tru... 2023-05-31, ∼1600🔥, 0💬

barplot() on Numeric Vector
How to use the barplot() function on a numeric vector? barplot() function is provided in the built-in "graphics" package. You don't need to install any external packages to use barplot(). If you have a numeric vector, you can visualize it as a bar chart with the barplot() function. Call barplot() wi... 2023-05-09, ∼1598🔥, 0💬

Data Structure - Matrix
What is a Matrix? Matrix is an extension of vector into 2 dimensions 1. Create a matrix object with the matrix() function - > m = matrix(1:20, nrow=5,ncol=4) > m [,1] [,2] [,3] [,4] [1,] 1 6 11 16 [2,] 2 7 12 17 [3,] 3 8 13 18 [4,] 4 9 14 19 [5,] 5 10 15 20 > typeof(m) [1] "inte... 2023-05-31, ∼1597🔥, 0💬

The R Graphics Package
What is The R Graphics Package? The R Graphics Package is built-in "graphics" package in the R environment. It provides functions for "base" graphics, which are traditional S-like graphics, as opposed to the more recent grid graphics. Here is a list of all functions provided in "graphics 4.0.5" rele... 2023-05-09, ∼1596🔥, 0💬

Data Frame Example - "cars"
What is the Data Frame Example, "cars"? "cars" is a built-in data frame example in R environment. "cars" has two columns: "speed" and "dist". Each row records an instance of the stopping distance of a car driving at a given speed. Note that the data were recorded in the 1920s. 1. Basic info on "cars... 2023-05-31, ∼1590🔥, 0💬

plot() on Data Frame
How to use the plot() function on a data frame? If you have a data frame with 2 columns, you can pass the data frame as the first argument to the plot() function to visualize the data. Call plot() with the example data frame, "cars": > dim(cars) [1] 50 2 > plot(cars) The following grap... 2023-03-17, ∼1575🔥, 0💬

Data Structure - Data Frame
What is a Data Frame? Data Frame is a generalization of matrix where columns may have different data types. Technically, a data frame is a special list. 1. Create a factor object with the data.frame() function - > name = c("Lori", "Mike", "Nill", "Sofi") > sex = factor( c("F", "M", "M"... 2023-05-31, ∼1458🔥, 0💬

Get Help in R Environment
How to get help in R environment? You can use the help() function to get help in R environment. 1. Get help on the help() function: > help(help) help is the primary interface to the help systems. Usage help(topic, package = NULL, lib.loc = NULL, verbose = getOption("verbose"), try.all.package... 2023-05-31, ∼1372🔥, 0💬

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