[R] looking for some functions to analyze a data set.

[Gabor Grothendieck]

You could use the weighted mean (?weighted.mean) or weighted median
(?wtd.quantile in package Hmisc).

On 9/19/06, Taka Matzmoto <sell_mirage_ne at hotmail.com> wrote:
> Hi R-users
> I have a data set. There are 10 products and the numbers of people who
> ranked the products.
>
> The format of the data set is
>
> productID   rank1 rank2 rank3 rank4 rank5 rank6 rank7 rank8 rank9 rank10
> -------------------------------------------------------------------------------------------------------
> 1                 10
> 2                  3
> 3                  6
> 4                  2
> 5                24
> 6                  8
> 7                  3
> 8                  8
> 9                  4
> 10                5
>
> Each cell has the number of people who ranked the product. For example, 4
> people who ranked 9th product best.
>
> I would like to know how to summarze this data using some R functions. My
> goal is to figure out what is the best product based on the ranking
> information.
>
> Easy one is to look at only rank1 column, then I do not utilize all
> information the data have.
> I can also do this. For each product, the number of people * rank scores and
> then pick lowest number for the best product.
>
> Is there any other way I can summarize this data?
>
> Any suggestion for R fundtions or statistical methos will be appreciated.
>
> Taka,
>
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