Useful functions for working with data objects in R

We have seen different data structures in R. Now let’s see some useful functions for working with these data objects.

Functions	Purpose
`length(x)`	Number of elements/components.
`dim(x)`	Dimensions of x.
`str(x)`	Structure of x.
`class(x)`	Class or type of x.
`mode(x)`	How x is stored.
`names(x)`	Names of components in x.
`c(x1, x2,...)`	Combines x1,x2 into a vector.
`cbind(x1, x2, ...)`	Combines x1,x2 as columns.
`rbind(x1, x2, ...)`	Combines x1,x2 as rows.
`x`	Prints the x.
`head(x)`	Lists the first part of the x.
`tail(x)`	Lists the last part of the x.
`ls()`	Lists current objects.
`rm(x1, x2, ...)`	Deletes one or more objects. The statement rm(list = ls()) will remove most objects from the working environment.
`y <- edit(x)`	Edits `x` and saves as `y`.
`fix(x)`	Edits in place.