{"id":169,"date":"2022-10-20T12:51:13","date_gmt":"2022-10-20T12:51:13","guid":{"rendered":"https:\/\/dorsu.edu.ph\/faculty\/jscabrera\/?page_id=169"},"modified":"2022-10-20T12:52:38","modified_gmt":"2022-10-20T12:52:38","slug":"r-variables","status":"publish","type":"page","link":"https:\/\/dorsu.edu.ph\/faculty\/jscabrera\/r-variables\/","title":{"rendered":"R Variables"},"content":{"rendered":"\n

<\/p>\n\n\n\n

Creating Variables in R<\/h2>\n\n\n\n

Variables are containers for storing data values.<\/p>\n\n\n\n

R does not have a command for declaring a variable. A variable is created the moment you first assign a value to it. To assign a value to a variable, use the <-<\/code> sign. To output (or print) the variable value, just type the variable name:<\/p>\n\n\n\n

Example<\/h3>\n\n\n\n
name <- \"John\"\nage <- 40\n\nname   # output \"John\"\nage    # output 40<\/code><\/pre>\n\n\n\n
From the example above, name<\/code> and age<\/code> are variables<\/strong>, while \"John\"<\/code> and 40<\/code> are values<\/strong>.<\/p>\n\n\n\n
In other programming language, it is common to use =<\/code> as an assignment operator. In R, we can use both =<\/code> and <-<\/code> as assignment operators.<\/p>\n\n\n\n
However, <-<\/code> is preferred in most cases because the =<\/code> operator can be forbidden in some context in R.<\/p>\n\n\n\n
\n\n\n\n
Print \/ Output Variables<\/h2>\n\n\n\n
Compared to many other programming languages, you do not have to use a function to print\/output variables in R. You can just type the name of the variable:<\/p>\n\n\n\n
Example<\/h3>\n\n\n\n
name <- \"John Doe\"\n\nname # auto-print the value of the name variable<\/code><\/pre>\n\n\n\n
However, R does have a print()<\/code> function available if you want to use it. This might be useful if you are familiar with other programming languages, such as Python<\/a>, which often use a print()<\/code> function to output variables.<\/p>\n\n\n\n
Example<\/h3>\n\n\n\n
name <- \"John Doe\"\n\nprint(name) # print the value of the name variable<\/code><\/pre>\n\n\n\n
And there are times you must use the print()<\/code> function to output code, for example when working with for<\/code> loops (which you will learn more about in a later chapter):<\/p>\n\n\n\n
Example<\/h3>\n\n\n\n
for (x in 1:10) {\n  print(x)\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
Creating Variables in R Variables are containers for storing data values. R does not have a command for declaring a variable. A variable is created the moment you first assign a value to it. To assign a value to a…
Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-169","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/dorsu.edu.ph\/faculty\/jscabrera\/wp-json\/wp\/v2\/pages\/169","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dorsu.edu.ph\/faculty\/jscabrera\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/dorsu.edu.ph\/faculty\/jscabrera\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/dorsu.edu.ph\/faculty\/jscabrera\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/dorsu.edu.ph\/faculty\/jscabrera\/wp-json\/wp\/v2\/comments?post=169"}],"version-history":[{"count":2,"href":"https:\/\/dorsu.edu.ph\/faculty\/jscabrera\/wp-json\/wp\/v2\/pages\/169\/revisions"}],"predecessor-version":[{"id":171,"href":"https:\/\/dorsu.edu.ph\/faculty\/jscabrera\/wp-json\/wp\/v2\/pages\/169\/revisions\/171"}],"wp:attachment":[{"href":"https:\/\/dorsu.edu.ph\/faculty\/jscabrera\/wp-json\/wp\/v2\/media?parent=169"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}