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Base R Vectors - GitHub Pages

base R Cheat Sheet RStudio is a trademark of RStudio, Inc. CC BY Mhairi McNeill Learn more at web page or vignette package version Updated: 3/15 InputOuputDescription df <- ( ) (df, )Read and write a delimited text <- ( ) (df, )Read and write a comma separated value file. This is a special case of load( )save(df, file = )Read and write an R data file, a file type special for R. ?mean Get help of a particular function. ( weighted mean ) Search the help files for a word or phrase. help(package = dplyr ) Find help for a package. Getting HelpAccessing the help filesMore about an objectstr(iris) Get a summary of an object s structure. class(iris) Find the class an object belongs Loopfor (variable in sequence){ Do something }Examplefor (i in 1:4){ j <- i + 10 print(j) }While Loopwhile (condition){ Do something }Examplewhile (i < 5){ print(i) i <- i + 1 }If Statementsif (condition){ Do something } else { Do something different }Exampleif (i > 3){ print( Yes ) } else { print( No ) }Functionsfunction_name <- function(var){ Do something return(new_variable) }Examplesquare <- function(x){ squared <- x*x return(squared) }a == bAre equala > bGreater thana >= bGreater than or equal (a)Is missinga !

as.numeric 1, 0, 1 Integers or floating point numbers. as.character '1', '0', '1' Character strings. Generally preferred to factors. as.factor '1', '0', '1', levels: '1', '0' Character strings with preset levels. Needed for some statistical models. Converting between common data types in R. Can always go from a higher value in the table to a ...

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