General S4 Class Extractor Functions
A collection and description of functions to extract
slots from S4 class objects.
The extractor functions are:
getModel |
Extracts the model slot from a S4 object, |
getTitle |
Extracts the title slot from a S4 object, |
getDescription |
Extracts the description slot from a S4 object, |
getSlot |
Extracts a specified slot from a S4 object, |
getArgs |
Shows the arguments of a S4 function. |
Since R version 2.14.0, a generic getCall() is part of R;
for earlier versions, we had provided a simple version for S4 objects.
getModel(object) getTitle(object) getDescription(object) getSlot(object, slotName) getArgs(f, signature)
f |
a generic function or the character-string name of one. |
object |
an object of class S4. |
signature |
the signature of classes to match to the arguments of |
slotName |
a character string, the name of the slot to be extracted from the S4 object. |
getModelgetTitlegetDescriptiongetSlot
return the content of the slot.
getArgs
returns the names of the arguments.
## Example S4 Representation:
# Hyothesis Testing with Control Settings
setClass("hypTest",
representation(
call = "call",
data = "numeric",
test = "list",
description = "character")
)
## Shapiro Wilk Normaility Test
swTest = function(x, description = "") {
ans = shapiro.test(x)
class(ans) = "list"
new("hypTest",
call = match.call(),
data = x,
test = ans,
description = description)
}
test = swTest(x = rnorm(500), description = "500 RVs")
## Extractor Functions:
isS4(test)
getCall(test)
getDescription(test)
## get arguments
args(returns)
getArgs(returns)
getArgs("returns")
getArgs(returns, "timeSeries")
getArgs("returns", "timeSeries")Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.