Data Type Conversion

Type conversions in R work as you would expect. For example, adding a character string to a numeric vector converts all the elements in the vector to character.

Use is.foo to test for data type foo. Returns TRUE or FALSE
Use as.foo to explicitly convert it.

is.numeric(), is.character(), is.vector(), is.matrix(), is.data.frame()
as.numeric(), as.character(), as.vector(), as.matrix(), as.data.frame)

Examples

 

  to one long
vector		 to
matrix		 to
dataframe
from
vector		 c(x,y)
 cbind(x,y)
rbind(x,y)		 data.frame(x,y)
from
matrix		 as.vector(mymatrix)   as.data.frame(mymatrix)
from
dataframe		   as.matrix(myframe)  

 

Dates

You can convert dates to and from character or numeric data. See date values for more information.