terms.object(stats)
terms.object()所属R语言包：stats
Description of Terms Objects
描述对象的条款
译者：生物统计家园网 机器人LoveR
描述----------Description----------
An object of class terms holds information about a model. Usually the model was specified in terms of a formula and that formula was used to determine the terms object.
terms类的对象拥有一个模型的信息。通常的模式是在指定formula“公式被用来确定对象。
值----------Value----------
The object itself is simply the formula supplied to the call of terms.formula. The object has a number of attributes and they are used to construct the model frame:
对象本身仅仅是提供呼叫terms.formula公式。对象具有一些属性，并用它们来构建模型框架：
参数：factors
A matrix of variables by terms showing which variables appear in which terms. The entries are 0 if the variable does not occur in the term, 1 if it does occur and should be coded by contrasts, and 2 if it occurs and should be coded via dummy variables for all levels (as when an intercept or lower-order term is missing). If there are no terms other than an intercept and offsets, this is numeric(0).
一个方面显示哪些变量在这方面出现的矩阵变量。条目是0，如果变量不发生在任期内，如果它不发生，应通过对比，和2编码，如果它发生，应通过各级哑变量编码（当一个拦截或低阶长期缺少）。如果有一个拦截和偏移以外的任何条款，这是numeric(0)。
参数：term.labels
A character vector containing the labels for each of the terms in the model, except for offsets. Non-syntactic names will be quoted by backticks. Note that these are after possible re-ordering (unless argument keep.order was false).
一个特征向量模型中的每一个方面的标签，除了抵消。非句法的名字将被引用的反引号。请注意，这些可能重新排序后（除非参数keep.order是假的）。
参数：variables
A call to list of the variables in the model.
list模型中的变量调用。
参数：intercept
Either 0, indicating no intercept is to be fit, or 1 indicating that an intercept is to be fit.
为0，表示没有拦截，是合适的，或1表示截距是要适合。
参数：order
A vector of the same length as term.labels indicating the order of interaction for each term.
一个term.labels表示为了每学期的互动相同长度的向量。
参数：response
The index of the variable (in variables) of the response (the left hand side of the formula). Zero, if there is no response.
指数响应变量（变量）（公式的左边）。零，如果没有任何反应。
参数：offset
If the model contains offset terms there is an offset attribute indicating which variable(s) are offsets
如果模型包含offset方面有一个offset属性，指示变量（S）偏移
参数：specials
If a specials argument was given to terms.formula there is a specials attribute, a pairlist of vectors (one for each specified special function) giving numeric indices of the arguments of the list returned as the variables attribute which contain these special functions.
如果specialsterms.formula参数还有specials属性，向量pairlist的（每个指定的特殊功能之一）给数字指标参数列表返回variables属性，它包含这些特殊功能。
参数：dataClasses
optional. A named character vector giving the classes (as given by .MFclass) of the variables used in a fit.
可选的。命名特征向量的类在一个合适的变量（如由.MFclass给）。
The object has class c("terms", "formula").
对象具有类c("terms", "formula")。
注意----------Note----------
These objects are different from those found in S. In particular there is no formula attribute, instead the object is itself a formula. Thus, the mode of a terms object is different as well.
这些对象是S中发现，特别是那些不同，有没有formula属性，而不是对象本身是一个公式。因此，一个对象的模式是不同的。
Examples of the specials argument can be seen in the aov and coxph functions, the latter from package survival.
可以看出specials和aov功能，后者从包coxphsurvival参数的例子。
参见----------See Also----------
terms, formula.
terms，formula。
举例----------Examples----------
## use of specials (as used for gam() in packages mgcv and gam)[＃特价（GAM（）包mgcv和GAM）]
(tf <- terms(y ~ x + x:z + s(x), specials = "s"))
## Note that the "factors" attribute has variables as row names[＃注意，“因素”属性变量作为列名]
## and term labels as column names, both as character vectors. [＃长期的标签和列名，无论是作为特征向量。]
attr(tf, "specials") # index 's' variable(s)[指数的变量（S）]
rownames(attr(tf, "factors"))[attr(tf, "specials")$s]
## we can keep the order by[＃我们可以保持订单]
terms(y ~ x + x:z + s(x), specials = "s", keep.order = TRUE)
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。
注3：如遇到不准确之处，请在本贴的后面进行回帖，我们会逐渐进行修订。
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发表于 2012-2-16 18:10:38
