[R] Excluding all missing values with dcast ("reshape2" package)

[Jessica Streicher]

This is not a reproducible example ;)

anyways, dcast has an attribute:
drop	
should missing combinations dropped or kept?

does that not do what you want?

On 03.12.2012, at 16:07, Michael.Laviolette at dhhs.state.nh.us wrote:

> 
> Hello--I'm doing a simple crosstab using dcast:
> 
> rawfreq <- dcast(nh11brfs, race3~CHCCOPD, length)
> 
> with the results
> 
>               race3 Yes   No NA
> 1 White non-Hispanic 446 5473 21
> 2 Other non-Hispanic  29  211  0
> 3           Hispanic   6   81  1
> 4               <NA>  10   83  1
> 
> How would I modify this call to exclude all missing values; that is, to
> obtain
> 
>               race3 Yes   No
> 1 White non-Hispanic 446 5473
> 2 Other non-Hispanic  29  211
> 3           Hispanic   6   81
> 
> Apologies if this has come up before, and thanks.
> 
> -M.L.
> 
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