Question

What are the various Data Types in R Language?

Answer 1

R has a wide variety of data types including scalars, vectors (numerical, character, logical), matrices, data frames, and lists.

Vectors

a <- c(1,2,5.3,6,-2,4) # numeric vector
b <- c("one","two","three") # character vector
c <- c(TRUE,TRUE,TRUE,FALSE,TRUE,FALSE) #logical vector

Refer to elements of a vector using subscripts.

a[c(2,4)] # 2nd and 4th elements of vector

Matrices

All columns in a matrix must have the same mode(numeric, character, etc.) and the same length. The general format is

mymatrix <- matrix(vector, nrow=r, ncol=c, byrow=FALSE, 
   dimnames=list(char_vector_rownames, char_vector_colnames))

byrow=TRUE indicates that the matrix should be filled by rows. byrow=FALSE indicates that the matrix should be filled by columns (the default). dimnames provides optional labels for the columns and rows.

Answer 2

R has a wide variety of data types including scalars, vectors (numerical, character, logical), matrices, data frames, and lists.

Vectors. a <- c(1,2,5.3,6,-2,4) # numeric vector. ...Matrices. All columns in a matrix must have the same mode(numeric, character, etc.) ...Arrays. ...Data Frames. ...Lists. ...Factors. ...