[R] Question about "Title"

[David Winsemius]

Good catch, Dennis. Thanks for permission copy this to the list to set  
the record straight.

-- David.

On Feb 17, 2010, at 9:34 PM, Dennis Murphy wrote:

> Hi David:
>
> I don't know if anyone corrected you on your use of bquote in the  
> title below,
> but
>
> plot(1,1)
> title(main= bquote(ss~"is sum of ID = "~ID, .(ss, ID)) )
>
> doesn't work - you get the text of ss and ID. You need
>
> plot(1, 1)
> title(main = bquote(.(ss)~"is the sum of ID = "~.(ID)))
>
> instead. It's OK...I struggle with bquote, too :) Thanks for the  
> reminder about
> substitute()...
>
> Dennis
>
>
> On Wed, Feb 17, 2010 at 11:03 AM, David Winsemius <dwinsemius at comcast.net 
> > wrote:
>
> On Feb 17, 2010, at 1:30 PM, David Winsemius wrote:
>
>
> On Feb 17, 2010, at 1:06 PM, Lu Wang wrote:
>
> Hi,
>
> I want to produce a pie chart with titles. I used the following  
> code. So it created a pie chart for the percentage of the score for  
> ID="002".
>
>
> ID <-
> c 
> ("001 
> ","001 
> ","002","002","002","003","003","003","004","004","005","005","006")
> test <-
> c("A","B","A","B","C","A","B","C","A","B","A","B","A")
> score <- c(60,90,32,56,89,45,77,82,68,79,56,77,90)
> mydata <- data.frame(ID,test,score)
> score_002 <- score[mydata$ID=="002"]
> lbls <- round(score_002/sum(score_002)*100)
> lbls <- paste(lbls,"%",sep="")
> par(mar=c(4,4,4,4),oma=c(0,0,0,0))
> pie(score_002,labels=lbls,radius=0.5)
> title(main="Pie chart of score",font.main=3,cex.main=1,line=-2.6)
> title(main="(Total score: 177)",font.main=3,cex.main=0.8,line=-3.6)
> title(main="ID is 002",font.main=3,cex.main=0.9,line=-22)
> As you can see in the title:"(Total score: 177)" and "ID is 002" is  
> inserted by hand. If I want to change the ID to "003" and let R  
> produce the corresponding score sum and ID: 003. How can I do this?  
> Is there any built-in function or I need to write my own function?
>
> ?substitute
>
> Or other options:
> > ss <- 120
> > ID = "003"
>
> > plot(1,1)
> > title(main= substitute(ss~"is sum of ID = "~ID, list(ss=ss,  
> ID=ID)) )
>
> #Or the equivalent:
> > plot(1,1)
> > title(main= bquote(ss~"is sum of ID = "~ID, .(ss, ID)) )
>
> #Or simply with paste:
> > plot(1,1)
> > title(main= paste(ss,"is sum of ID = ",ID))
>
> The paste() method is what I would have tried a few months ago, but  
> I have been struggling to understand the proper use of expressions,  
> so I tried those first.
>
> -- 
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
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>

David Winsemius, MD
Heritage Laboratories
West Hartford, CT