R help - Sep 2008 - Reporting with down and across variables

Hi,

I have a dataframe like the following:

xfact   yfact   zfact   response
-------   -------   -------   --------------
x1       y1      z1          r1
x1       y1      z2          r2
...

I want output that looks like:

                    ___ zfac levels___
xfact   yfact   z1   z2   ... zn
-------   -------   ----  ----   ... ----
x1      y1       r1   r2        rn
....

How can I go about this?

Thanks,
Matt

-- 
It is from the wellspring of our despair and the places that we are
broken that we come to repair the world.
-- Murray Waas

[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)

-------------------------------------
Wanted output:

w   x   y   g      h
-   -   -   -      -
a   c   e   0.1    0.2
a   c   f   -0.4   0.32
a   d   e   ...    ....
...

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