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R 中的许多函数都提供了某种控制台输出（例如 NbClust() 等）。是否有任何方法可以在不查看输出的情况下检索某些输出（例如某个整数值）？从控制台读取的任何方式？

想象一下，输出看起来像包手册中提供的示例代码的以下输出：

[1] "Frey index : No clustering structure in this data set"
*** : The Hubert index is a graphical method of determining the number of clusters.
                In the plot of Hubert index, we seek a significant knee that corresponds to a 
                significant increase of the value of the measure i.e the significant peak in Hubert
                index second differences plot. 

*** : The D index is a graphical method of determining the number of clusters. 
                In the plot of D index, we seek a significant knee (the significant peak in Dindex
                second differences plot) that corresponds to a significant increase of the value of
                the measure. 

******************************************************************* 
* Among all indices:                                                
* 1 proposed 2 as the best number of clusters 
* 2 proposed 4 as the best number of clusters 
* 2 proposed 6 as the best number of clusters 
* 1 proposed 7 as the best number of clusters 

                   ***** Conclusion *****                            

* According to the majority rule, the best number of clusters is  4 


*******************************************************************

如何从上述输出的最后一行检索值4 ？

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2 回答 2

3

最好使用对象而不是在控制台中输出。任何“好的”函数都会返回有希望的结构化输出，可以使用$或@符号访问，用于str()查看对象的结构。

就您而言，我认为这应该可行：

length(unique(res$Best.partition))
于 2016-05-18T08:32:45.640 回答
1

另一种选择是：

max(unlist(res[4]))
于 2018-09-04T17:44:54.687 回答