[R] How to stamp my graphs with date and time

[David Winsemius]

Sarkar offers a worked example of taking user input regarding location  
for locating a grid viewport outside the plot area.

http://lmdvr.r-forge.r-project.org/figures/figures.html

See Figure 12.1

state <- data.frame(state.x77, state.region)
trellis.vpname("xlab", prefix = "plot1")
trellis.vpname("strip", column = 2, row = 2, prefix = "plot2")


data(Chem97, package = "mlmRev")
qqmath(~ gcsescore | factor(score), Chem97, groups = gender,
        f.value = function(n) ppoints(100),
        aspect = "xy",
        page = function(n) {
            cat("Click on plot to place legend", fill = TRUE)
            ll <- grid.locator(unit = "npc")
            if (!is.null(ll))
                draw.key(simpleKey(levels(factor(Chem97$gender))),
                         vp = viewport(x = ll$x, y = ll$y),
                         draw = TRUE)
        })

-- 
David.

On Apr 21, 2010, at 6:32 PM, Jun Shen wrote:

> Thanks, David.
>
> mtext is for "graphics". Is there an equivalent function for  
> "lattice"?
>
> Jun
>
> On Wed, Apr 21, 2010 at 4:44 PM, David Winsemius <dwinsemius at comcast.net 
> > wrote:
>
> On Apr 21, 2010, at 5:41 PM, Jun Shen wrote:
>
> Dear all,
>
> How do stamp my graphs with date and time somewhere like left corner  
> of the
> graph (not the plotting area). I know date() and Sys.time(), but  
> where to?
> Thanks.
>
> ?mtext
>
>
> Jun
>
>        [[alternative HTML version deleted]]
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>
> David Winsemius, MD
> West Hartford, CT
>
>

David Winsemius, MD
West Hartford, CT