[R] bwplot in loop

[David Winsemius]

On May 17, 2010, at 1:36 PM, GL wrote:

>
> I have the two loops listed below. The first executes perfectly and  
> creates a
> series of density plots. The second does not produce any output,  
> however, if
> I enter the exact bwplot command after the loop executes, I get  
> output for
> the last value in the list of services. Why am I not getting output  
> for
> bwplot inside the loop?
>
> #INSIDE LOOP PERFECT OUTPUT - ONE FOR EACH SERVICE
> for (Service in Service.Levels) {
>     dbs1 <- subset( dbs,Service.Code == Service)
>        if(nrow(dbs1) >2)  {
>           plot(density(dbs1$Enter.to.Incision))
> }}
>
> #INSIDE LOOP NO OUTPUT
> for (Service in Service.Levels) {
>     dbs1 <- subset( dbs,Service.Code == Service)
>           bwplot(M.Surg..Last.Name ~ Enter.to.Incision , data=dbs1)

Read FAQ 7.31

> }
>
> #AFTER LOOP AS SINGLE STATEMENT  - PERFECT OUTPUT FOR LAST SERVICE  
> IN LIST
> bwplot(M.Surg..Last.Name ~ Enter.to.Incision , data=dbs1)
>
> -- 
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>
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David Winsemius, MD
West Hartford, CT