warning(base)
warning()所属R语言包：base
Warning Messages
警告讯息
译者：生物统计家园网 机器人LoveR
描述----------Description----------
Generates a warning message that corresponds to its argument(s) and (optionally) the expression or function from which it was called.
对应参数（S）和（可选）的表达或功能，它被称为生成一条警告消息。
用法----------Usage----------
warning(..., call. = TRUE, immediate. = FALSE, domain = NULL)
suppressWarnings(expr)
参数----------Arguments----------
参数：...
zero or more objects which can be coerced to character (and which are pasted together with no separator) or a single condition object.
零个或多个对象可以强制转换为字符（并粘贴在一起，没有分隔）或一个单一的条件对象。
参数：call.
logical, indicating if the call should become part of the warning message.
逻辑，表示如果调用应该成为的警告消息的一部分。
参数：immediate.
logical, indicating if the call should be output immediately, even if getOption("warn") <= 0.
逻辑，表示如果调用应该是输出，即使getOption("warn") <= 0的。
参数：expr
expression to evaluate.
表达式。
参数：domain
see gettext. If NA, messages will not be translated.
看到gettext。如果NA，消息不会被翻译。
Details
详情----------Details----------
The result depends on the value of options("warn") and on handlers established in the executing code.
结果取决于options("warn")的价值和在执行的代码建立的处理程序。
If a condition object is supplied it should be the only argument, and further arguments will be ignored, with a message.
如果一个条件对象提供，它应该是唯一的参数，将被忽略的消息，进一步论据。
warning signals a warning condition by (effectively) calling signalCondition. If there are no handlers or if all handlers return, then the value of warn = getOption("warn") is used to determine the appropriate action. If warn is negative warnings are ignored; if it is zero they are stored and printed after the top–level function has completed; if it is one they are printed as they occur and if it is 2 (or larger) warnings are turned into errors. Calling warning(immediate. = TRUE) turns warn <= 0 into warn = 1 for this call only.
warning信号（有效）调用signalCondition警告条件。如果没有处理程序，或者如果所有处理程序的回报，那么warn = getOption("warn")值用于确定适当的行动。如果warn是负面的警告被忽略，如果是零，他们都是顶级的功能已完成后，存储和打印;如果它是一个印有发生，因为他们如果是2（或更大）警告变成错误。调用warning(immediate. = TRUE)变成warn <= 0到warn = 1仅此呼叫。
If warn is zero (the default), a read-only variable last.warning is created. It contains the warnings which can be printed via a call to warnings.
如果warn是零（默认），只读变量last.warning创建。它包含可打印调用warnings通过的警告。
Warnings will be truncated to getOption("warning.length") characters, default 1000, indicated by [... truncated].
警告将被截断getOption("warning.length")字符，缺省为1000，表示[... truncated]。
While the warning is being processed, a muffleWarning restart is available. If this restart is invoked with invokeRestart, then warning returns immediately.
虽然正在处理的警告，muffleWarning重新启动。如果在重新启动被调用时，与invokeRestart然后warning立即返回。
An attempt is made to coerce other types of inputs to warning to character vectors.
试图将强迫warning特征向量输入其他类型的。
suppressWarnings evaluates its expression in a context that ignores all warnings.
suppressWarnings评估其表达的情况下，忽略所有警告。
值----------Value----------
The warning message as character string, invisibly.
作为character字符串，无形的警告消息。
参考文献----------References----------
The New S Language. Wadsworth & Brooks/Cole.
参见----------See Also----------
stop for fatal errors, message for diagnostic messages, warnings, and options with argument warn=.
stop致命错误，message诊断消息，warnings，options参数warn=。
gettext for the mechanisms for the automated translation of messages.
gettext自动翻译的消息机制。
举例----------Examples----------
testit <- function() warning("testit")
testit() ## shows call[＃显示呼叫]
testit <- function() warning("problem in testit", call. = FALSE)
testit() ## no call[＃调用]
suppressWarnings(warning("testit"))
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 2012-2-16 20:47:54
