[R] Histograms with strings,

[David Winsemius]

On Mar 17, 2011, at 6:06 PM, Khanvilkar, Shashank wrote:

> Hello,
> Thanks in advance for any help,
>
> I have read a CSV file in which there is a column for an IP addr as  
> in:
>
> tmpInFile$V2
>  [1] "74.125.224.38" "74.125.224.38" "129.46.71.19"  "129.46.71.19"
>  [5] "129.46.71.19"  "129.46.71.19"  "129.46.71.19"  "129.46.71.19"
>  [9] "129.46.71.19"  "129.46.71.19"  "129.46.71.19"  "129.46.71.19"
>
> If I want to find the IP addr that has the highest occurrence  
> (129.46.71.19, in this case), is there a simple way to do this?

Try:
 > vec <- c(
+   "74.125.224.38", "74.125.224.38", "129.46.71.19",  "129.46.71.19",
+   "129.46.71.19",  "129.46.71.19",  "129.46.71.19",  "129.46.71.19",
+   "129.46.71.19",  "129.46.71.19",  "129.46.71.19",  "129.46.71.19")
 > table(vec)
vec
  129.46.71.19 74.125.224.38
            10             2
 > which.max(table(vec))
129.46.71.19
            1
 > table(vec)[which.max(table(vec))]
129.46.71.19
           10

>
> Thanks
> Shank
>
> 	[[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.

David Winsemius, MD
West Hartford, CT