The help() function in R is a built-in
function that provides information about functions, datasets, and other topics
within R.
Syntax :
help(topic,
package = NULL, help_type = NULL, lib.loc = NULL,
verbose
= getOption("verbose"), try.all.packages =
getOption("help.try.all.packages"))
l Here,
topic is the name of the function, dataset, or topic that you want to learn
more about.
l The
package parameter is used to specify the package where the topic is located.
l The
help_type parameter is used to specify the type of help that you want to display,
such as examples or arguments.
l The
lib.loc parameter is used to specify the library location where the package is
installed.
l The
verbose parameter is a logical value that determines whether additional
information is displayed.
l The
try.all.packages parameter is a logical value that determines whether to search
all installed packages for the specified topic.
Ø
Types
of Help function:
There
are three main types of help that can be accessed with the help() function in
R:
a.
Basic Help:
This provides a brief overview of the function, including its purpose and
syntax.
b.
Examples:
This provides examples of how to use the function in R code.
c.
Arguments:
This provides detailed information about the arguments of the function,
including their data types, default values, and descriptions.
For example,
l if
you want to learn more about the mean() function in R, you can use the help()
function as follows:
help(mean)
This will open up a help page with a
detailed explanation of the mean() function, including its purpose, usage, and
parameters. The help page also provides examples of how to use the mean()
function in R code, as well as detailed information about the arguments of the
function.
l If
you want to search for all topics related to linear regression, you can use the
help.search() function as follows:
help.search("linear
regression")
This will display a list of all
functions, datasets, and topics related to linear regression in R
documentation.
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