Hi Sudhakar,
Take a look at ?which.max
msales <- c(2700, 2600, 3050)
names(msales) <- c("Jan", "Feb", "Mar")
names(which.max(diff(msales)))
# [1] "Mar"
HTH,
Jorge
On Sat, Oct 30, 2010 at 12:27 PM, Sudhakar Kumar <> wrote:
>
> Just starting on my journey to learn R and the book I am using is "Using R
> for Introductory Statistics"
>
> One of the problems (page 15, 1.10) goes as follows:
> The monthly sales fig for 2002 were (2700, 2600, 3050, . . ). Using diff()
> find the month with greatest increase from prev month.
>
> I created a msales var:
> msales = c(2700, 2600, 3050 . . )
>
> I named them:
> names(msales)=c("Jan", Feb", "Mar" . . .)
>
> to find the month with greatest increase from prev month:
> max(diff(msales))
>
> I get the numeric value displayed when I execute the above function, but
> not the month. cumsum(msales) displays the results under each month, but not
> max. How can I get both the month and value displayed?
>
> Thanks
> -Sudhakar
>
> ps: no, I am not a student seeking answers to exercises :)
>
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>
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