[R] Reporting with down and across variables

[Matthew Pettis]

It does, thanks!  Did I miss in the documentation that the variable
has to be named 'value'?

On Thu, Sep 18, 2008 at 10:08 AM, hadley wickham <h.wickham at gmail.com> wrote:
> On Thu, Sep 18, 2008 at 10:03 AM, Matthew Pettis
> <matthew.pettis at gmail.com> wrote:
>> [Reposting with changed example]
>> Hi,
>>
>> I want to take the dataframe df generated below and reshape the data with
>> column names being w, x, y, and the different levels of z.  The values under
>> the different levels of z are the corresponding values of r.  I've tried
>> reshape and cast, and I can't seem to find the right combination.  Any help
>> is appreciated,
>>
>> Matt
>> ---------------------------------
>>   # Generate data
>> w <- c("a","b")
>> x <- c("c","d")
>> y <- c("e","f")
>> z <- c("g","h")
>> df <- expand.grid(w=w,x=x,y=y,z=z)
>> df$r <- rnorm(16,mean=0,sd=1)
>
> Well if you change that last line to :
>
> df$value <- rnorm(16,mean=0,sd=1)
>
> Then I think the following does what you want:
>
> cast(df, w + x + y ~ z)
>
> Hadley
>
> --
> http://had.co.nz/
>



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