Question

两个问题涉及<条码>盒式<>。

What are the options for na.action? The documentation doesn t list them.
How would I go about answering these types of question in the future?

Answer 1

总的来说,我认为,内在帮助非常好。请注意,<代码>盒式的求助网页没有说明这些选择。

在此情况下,?na.action and -- following from there -- ?na.omit解释各种可能性(这些可能性相当笼统,也适用于. Boxplot以外的事项)。

Handle Missing Values in Objects

Description:

     These generic functions are useful for dealing with ‘NA’s in e.g.,
     data frames.  ‘na.fail’ returns the object if it does not contain
     any missing values, and signals an error otherwise.  ‘na.omit’
     returns the object with incomplete cases removed.  ‘na.pass’
     returns the object unchanged.

Usage:

     na.fail(object, ...)
     na.omit(object, ...)
     na.exclude(object, ...)
     na.pass(object, ...)

Arguments:

  object: an R object, typically a data frame

     ...: further arguments special methods could require.

Details:

     At present these will handle vectors, matrices and data frames
     comprising vectors and matrices (only).

     If ‘na.omit’ removes cases, the row numbers of the cases form the
     ‘"na.action"’ attribute of the result, of class ‘"omit"’.

     ‘na.exclude’ differs from ‘na.omit’ only in the class of the
     ‘"na.action"’ attribute of the result, which is ‘"exclude"’.  This
     gives different behaviour in functions making use of ‘naresid’ and
     ‘napredict’: when ‘na.exclude’ is used the residuals and
     predictions are padded to the correct length by inserting ‘NA’s
     for cases omitted by ‘na.exclude’.

Answer 2

这种办法有助于R软件在计算和任何图表中忽略缺失的数值:

na.rm=TRUE

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