I can't see the value of your first melt, which appears to result in a column 
filled with identical values "crop_group".

You really should read the posting guide and provide a reproducible example.

I suspect that you would benefit from learning how to use the plyr library.
-- 
Sent from my Android phone with K-9 Mail. Please excuse my brevity.

Muzna Alvi <muzna.a...@gmail.com> wrote:

thanks for that ista actually i want to break this into maybe three different 
data sets with each of the 3 kinds of sugarcane... it would be better if i 
could have this in one data set but if someone could tell me how i can run 
descriplitive statistics on each of the groups separately.. i would need to 
melt and cast for that right? On Thu, Mar 10, 2011 at 8:46 PM, Ista Zahn 
<iz...@psych.rochester.edu>wrote: > Hi Muzna, > If I understand your question, 
it's not really about melting or > casting, but about re-ordering. Try this: > 
> canefile <- canefile[order(canefile$value), ] > > see ?"[" and ?order > > 
HTH, > Ista > > On Thu, Mar 10, 2011 at 2:20 PM, Muzna Alvi 
<muzna.a...@gmail.com> wrote: > > I have a dataset that is based on crop output 
for a single crop > > *sugarcane*...but > > each observation is further 
subdivided into 3 kinds of sugarcane > > i have read the file and have also 
used melt it to sort it on the > > basis of *crop > > group* using > > > > 
melt(sugarcane,
m=c("Crop_group")) -> canefile > > > > this is how it has cast the data > > > > 
variable value > > 1 Crop_group Sugarcane (first ratoon) > > 2 Crop_group 
Sugarcane (planted crop) > > 3 Crop_group Sugarcane (planted crop) > > 4 
Crop_group Sugarcane (second ratoon) > > 5 Crop_group Sugarcane (first ratoon) 
> > 6 Crop_group Sugarcane (planted crop) > > > > > > now i need to *cast *the 
data so that i can have each of the 20 odd > > variables sorted according to 
the 3 subdivisions under *Crop_group *ie > first > > ratoon), second ratoon etc 
etc.. > > > > i tried using > > > > cast (canefile, ~value) -> canefile > > > > 
but it said "Aggregation requires fun.aggregate: length used as default" > > > 
> i want to cast it on all the 20 variables and sort it on the basis of > first 
> > ratoon, second ratoon and planted crop > > > > How i do my CAST command? > 
> > > I hope my question is clear...thanks in advance > > > > * > > * > > * > > 
* > > -- > > -- > > > > [[alternative HTML version
deleted]] > > > >_____________________________________________
> > R-help@r-project.org mailing list > > 
> > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting 
> > guide > http://www.R-project.org/posting-guide.html > > and provide 
> > commented, minimal, self-contained, reproducible code. > > > > > > -- > 
> > Ista Zahn > Graduate student > University of Rochester > Department of 
> > Clinical and Social Psychology > http://yourpsyche.org > -- --         
> > [[alternative HTML version 
> > deleted]]_____________________________________________
R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help 
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html 
and provide commented, minimal, self-contained, reproducible code. 


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