Re: [R] Histograms with strings,

From: David Winsemius <dwinsemius_at_comcast.net>
Date: Thu, 17 Mar 2011 22:18:28 -0400

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]]
>
> ______________________________________________
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David Winsemius, MD
West Hartford, CT



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