R help - Mar 2011 - A basic question about reshape2

Dear R Community:

 

This is a newbie reshare2 question; it starts with read a set of data and to
melt it:

x =
data.frame(I=c("a","b","a","b","b"),
V=c(2,4,2,5,7))

y = melt(x, id = 1:1) 

 

What is wrong with the final dcast step:

z = dcast(y, formula = I ~ "variable",  c(length, mean, median))

 

Will one of you please help me with this problem?

 

 


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I am not sure about this but I don't see how a melt command helps.

See what 
z = dcast(x, I ~ V, mean)
gives you.


--- On Sun, 3/13/11, Jim & Carolyn Watkins <jcwatkin at gwi.net>
wrote:
> From: Jim & Carolyn Watkins <jcwatkin at gwi.net>
> Subject: [R] A basic question about reshape2
> To: r-help at r-project.org
> Received: Sunday, March 13, 2011, 9:18 AM
> Dear R Community:
> 
>  
> 
> This is a newbie reshare2 question; it starts with read a
> set of data and to
> melt it:
> 
> x =
data.frame(I=c("a","b","a","b","b"),
V=c(2,4,2,5,7))
> 
> y = melt(x, id = 1:1) 
> 
> What is wrong with the final dcast step:
> 
> z = dcast(y, formula = I ~ "variable",? c(length,
> mean, median))
> Will one of you please help me with this problem?