Prof Ripley,

I see that now; I can get the transparency to work, but even with using
pdf() my plot still does not draw if I first use:

grid.picture(noaalogo,distort=**FALSE,width=0.5,x=0.50,y=0.50)
grid.rect(gp=gpar(fill=rgb(1,**1,1,0.9)))

Regards,
Tom


On Fri, Dec 28, 2012 at 1:55 PM, Prof Brian Ripley <ripley@stats.ox.ac.uk>wrote:

> I suspect you need a device supporting translucency: PostScript does not
> and hence postscript() cannot.  Try the pdf() device (and convert the
> output if you need it).
>
>
> On 28/12/2012 17:23, Thomas Adams - NOAA Federal wrote:
>
>> Hi…
>>
>> I want to use grImport to create a watermark on a plot() using the methods
>> Paul Murrell describes here:
>> http://cran.r-project.org/web/**packages/grImport/vignettes/**import.pdf<http://cran.r-project.org/web/packages/grImport/vignettes/import.pdf>(page
>> 28). I can essentially reproduce this manually at the R prompt, and
>>
>
> On what OS and what device: see the posting guide ....
>
>  independently I can use grid.picture(…) successfully in a R script, but
>> when I attempt to do do this in my script:
>>
>> •
>> •
>> •
>> postscript(outputFilename,**paper="us")
>>
>> grid.picture(noaalogo,distort=**FALSE,width=0.5,x=0.50,y=0.50)
>> grid.rect(gp=gpar(fill=rgb(1,**1,1,0.9)))
>>
>>
>> plot(dat,xaxt="n",type="b",**ylim=c(y_range[1],y_range[2]),**
>> main=labelStr,xlab="Date",**ylab="Elevation,
>> NAVD88 (Ft)")
>> •
>> •
>> •
>> dev.off()
>>
>> The picture "noaalogo" is drawn, but either the plot() is obscured or is
>> not drawn at all. In either case, the "watermarking" effect is not
>> happening in my script, but does work as expected, manually, at the R
>> prompt. I'm sure this is a graphics device related issue, but I have not
>> been able to find a solution through my searches.
>>
>> Thank you,
>> Tom
>>
>>
>>
>>
>> ______________________________**________________
>> R-help@r-project.org mailing list
>> https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help>
>> PLEASE do read the posting guide http://www.R-project.org/**
>> posting-guide.html <http://www.R-project.org/posting-guide.html>
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>
>
> --
> Brian D. Ripley,                  ripley@stats.ox.ac.uk
> Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~**ripley/<http://www.stats.ox.ac.uk/~ripley/>
> University of Oxford,             Tel:  +44 1865 272861 (self)
> 1 South Parks Road,                     +44 1865 272866 (PA)
> Oxford OX1 3TG, UK                Fax:  +44 1865 272595
>
> ______________________________**________________
> R-help@r-project.org mailing list
> https://stat.ethz.ch/mailman/**listinfo/r-help<https://stat.ethz.ch/mailman/listinfo/r-help>
> PLEASE do read the posting guide http://www.R-project.org/**
> posting-guide.html <http://www.R-project.org/posting-guide.html>
> and provide commented, minimal, self-contained, reproducible code.
>



-- 

Thomas E Adams

Development & Operations Hydrologist
National Weather Service
Ohio River Forecast Center
1901 South State Route 134
Wilmington, OH 45177

http://www.erh.noaa.gov/er/ohrfc/

EMAIL:	thomas.adams@noaa.gov
VOICE:	937-383-0528
FAX:	937-383-0033

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