SClassExtension-class(methods)
SClassExtension-class()所属R语言包：methods
Class to Represent Inheritance (Extension) Relations
类来表示继承（扩展部分）的关系
译者：生物统计家园网 机器人LoveR
描述----------Description----------
An object from this class represents a single "is" relationship; lists of these objects are used to represent all the extensions (superclasses) and subclasses for a given class. The object contains information about how the relation is defined and
从这个类的对象代表一个单一的是的关系，这些对象名单被用来代表某一类的所有扩展（父）和子。该对象包含有关如何定义的关系信息和
类的对象----------Objects from the Class----------
Objects from this class are generated by setIs, from direct calls and from the contains= information in a call to setClass, and from class unions created by setClassUnion. In the last case, the information is stored in defining the subclasses of the union class (allowing unions to contain sealed classes).
从这个类的对象所产生的setIscontains=创建，直接调用setClass调用setClassUnion在信息，并从类工会。在去年的情况下，将信息存储在确定工会类的子类（允许工会包含密封类）。
插槽----------Slots----------
subClass,superClass: The classes being extended:
subClass,superClass：正在扩展的类：
package: The package to which that class belongs.
package：包，类属。
coerce: A function to carry out the as() computation implied by the relation. Note that these functions should not be used directly. They only deal with the strict=TRUE calls to the as function, with
coerce：开展计算隐含的关系为（）函数。请注意，不应直接使用这些功能。他们只处理strict=TRUEas函数的调用，
test: The function that would test whether the relation holds. Except for explicitly specified test
test：该功能，将测试的关系是否成立。除了明确指定test
replace: The method used to implement as(x,
replace：方法用于实现的<code>为（x，
simple: A "logical" flag, TRUE if this is a simple relation, either because one class is contained in the definition of another, or because a class has been explicitly stated to extend a virtual class. For simple extensions, the
simple："logical"标志，TRUE如果这是一个简单的关系，要么是因为一个类包含在另一个定义，或一类，因为已经明确表示要扩展虚拟类。对于简单的扩展，
by: If this relation has been constructed
by：如果这种关系已建成
dataPart: A "logical" flag, TRUE if the extended class is in fact the data part of the subclass. In
dataPart：一个"logical"标志，TRUE如果扩展的类实际上是子类的数据部分。在
distance: The distance between the two classes,
distance：两个类之间的距离，
方法----------Methods----------
No methods defined with class "SClassExtension" in the signature.
没有定义的方法类"SClassExtension"签名。
参见----------See Also----------
is, as, and the classRepresentation class.
is，as，classRepresentation类。
转载请注明:出自 生物统计家园网(http://www.biostatistic.net)。
注：
注1：为了方便大家学习，本文档为生物统计家园网机器人LoveR翻译而成，仅供个人R语言学习参考使用，生物统计家园保留版权。
注2：由于是机器人自动翻译，难免有不准确之处，使用时仔细对照中、英文内容进行反复理解，可以帮助R语言的学习。
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发表于 2012-2-17 10:04:02
