The following table lists several basic functions in R that go well with functionals.
| Functions | Description |
|---|---|
length( ) |
Finds the number of elements in a vector or list. |
dim( ) |
Finds the number of elements per dimension in an array, matrix, or data.frame. |
max( ) |
Finds the largest number in any non-list object. |
min( ) |
Finds the smallest number in any non-list object. |
which.max( ) |
Finds which element is the largest number in any non-list object. |
which.min( ) |
Finds which element is the smallest number in any non-list object. |
sum( ) |
Finds the sum of all elements in a vector or array. |
prod( ) |
Finds the product of all elements in a vector or array. |
sqrt( ) |
Finds the square root of each element in a vector or array. |
mean( ) |
Finds the average of all elements in a vector or array. |
median( ) |
Finds the median of all elements in a vector or array |
sd( ) |
Finds the standard deviation of all elements in a vector or array. |
var( ) |
Finds the variance of all elements in a vector or array. |
names( ) |
Finds the names of elements in a vector or list. |
dimnames( ) |
Find the names of elements per dimension in an array. |
any( ) |
Asks if any elements in a vector are TRUE. |
all( ) |
Asks if all elements in a vector are TRUE |