Displays help and structure of an object, or help of a package. Two syntax sugars are added to enhance utils::?. One is object?. which works as if ?object. Another is package?p which works as if help(package = package)

"?"(e1, e2)

## Arguments

e1 A topic of document. Refer to topic argument described in utils::?. . and p have special meanings as documented above. Otherwise, e2 is same as type argument of utils::?.

## Examples

# Identical to help(identity); print(identity)
?identity#> function (x)
#> x
#> <environment: namespace:base>identity?.  # The same#> function (x)
#> x
#> <environment: namespace:base>
# Identical to help(iris); str(iris)
?iris#> 'data.frame':	150 obs. of  5 variables:
#>  $Sepal.Length: num 5.1 4.9 4.7 4.6 5 5.4 4.6 5 4.4 4.9 ... #>$ Sepal.Width : num  3.5 3 3.2 3.1 3.6 3.9 3.4 3.4 2.9 3.1 ...
#>  $Petal.Length: num 1.4 1.4 1.3 1.5 1.4 1.7 1.4 1.5 1.4 1.5 ... #>$ Petal.Width : num  0.2 0.2 0.2 0.2 0.2 0.4 0.3 0.2 0.2 0.1 ...
#>  $Species : Factor w/ 3 levels "setosa","versicolor",..: 1 1 1 1 1 1 1 1 1 1 ...iris?. # The same#> 'data.frame': 150 obs. of 5 variables: #>$ Sepal.Length: num  5.1 4.9 4.7 4.6 5 5.4 4.6 5 4.4 4.9 ...
#>  $Sepal.Width : num 3.5 3 3.2 3.1 3.6 3.9 3.4 3.4 2.9 3.1 ... #>$ Petal.Length: num  1.4 1.4 1.3 1.5 1.4 1.7 1.4 1.5 1.4 1.5 ...
#>  $Petal.Width : num 0.2 0.2 0.2 0.2 0.2 0.4 0.3 0.2 0.2 0.1 ... #>$ Species     : Factor w/ 3 levels "setosa","versicolor",..: 1 1 1 1 1 1 1 1 1 1 ...
# Identical to help(package = MASS)
MASS?p