Combining numeric vs numeric & numeric vs factor graphs into one ps/pdf file

Deepayan,

Thank you for your response.  I tried your suggestion to manually specify the y-axis label for the factor but I am stuck.  My attempt is below.  I once again appreciate any input as well as your time.  lattice/R-project is great.

Thanks once again,

David Arenas

# Example dataframe
test.df <- data.frame(acft=factor(c("A","B","C","D")),
                      status=factor(c("fail","pass","fail","pass")), 
                      site=factor(c("E1","E1","E2","E2")),
                      CD=as.numeric(c(1,1,3,3)),
                      H=as.numeric(c(80,NA,60,NA)))

# Your previous suggestion
xyplot(ifelse(status=="pass", as.numeric(site), H) ~ CD| acft,
       data=test.df,
       scales="free",
       xlim=c(0,4))

# My attempt to manually adjust the y-axis label for the factor "site"
# site has E1 & E2 that are read as 1 and 2, so I am trying to adjust
# the ylim for acft B and D to c(0,2) but I get an error
xyplot(ifelse(status=="pass", as.numeric(site), H) ~ CD| acft,
       data=test.df,
       scales="free",
       prepanel=function(x,y) {
                ylim <- if(test.df$status=="pass") 2 else 90
                list(xlim=range(0:4),
                     ylim=range(0:ylim)) }  ) 


-----Original Message-----
From: Deepayan Sarkar [mailto:deepayan at stat.wisc.edu]
Sent: Tuesday, May 03, 2005 19:59
To: r-help at stat.math.ethz.ch
Cc: Arenas, David R. CIV NAVAIR DEPT
Subject: Re: [R] Combining numeric vs numeric & numeric vs factor graphs
into one ps/pdf file

Dear R community,

My previous email was incomplete because I used html format.  Here it
is again and sorry for any inconvenience:

xyplot (lattice) has been great in displaying tons of data for my
research.  I have used the following two xyplot commands (with
example dataframe) to create two separate postscript/pdf files with
respect to the variable "acft" and subset "status":

test.df <- data.frame(acft=factor(c("A","B","C","D")),
                             
status=factor(c("fail","pass","fail","pass")),
site=factor(c("E1","E1","E2","E2")), CD=as.numeric(c(1,1,3,3)),
                              H=as.numeric(c(80,NA,60,NA)))

xyplot(H ~ CD | acft,
          data=test.df,
          subset=status=="fail",
          layout=c(1,1) )

xyplot(site ~ CD | acft,
          data=test.df,
          subset=status=="pass",
          layout=c(1,1) )

 I would like to combine all graphs into one file in alphabetical
order of variable "acft".  The graphs would be one per page where in
fact I use layout=c(1,1) for the nice and easily seen strip labels
for "acft".  The problem I am having is combining x-y plots that are
numeric vs numeric & numeric vs factor.  I have search the R-help
archives and R-project references for an example to no avail.  I am
thinking I may have to use something (lattice or not) like ...

if any(test.df$Status=="fail")
plot(H ~ CD)
else
plot(site ~ CD)

with "for" in the beginning to loop through all data with respect to
acft.  I need a hint on how to further this along.  I am using
R.2.1.0 via Windows XP.

I can't think of a clean way to do this. You could of course do 

xyplot(ifelse(status == "pass", as.numeric(site), H) ~ CD| acft,
       data=test.df, scales = "free",
       layout=c(1,1) )

but this wouldn't give very nice axis labels for the factor (unless you 
specify them manually, which could be done).

Deepayan