>>>>> "RT" == Rolf Turner <rolf.tur...@xtra.co.nz> writes:
RT> Compare: RT> require(lattice) RT> cairo_pdf(file="mung.pdf") RT> print(xyplot(y~x,data=data.frame(x=1:10,y=1:10),main=expression(Length==mu*m))) RT> dev.off() RT> and RT> pdf(file="gorp.pdf") RT> print(xyplot(y~x,data=data.frame(x=1:10,y=1:10),main=expression(Length==mu*m))) RT> dev.off() After using qpdf(1) to uncompress the pdfs, the latter produces: BT /F6 1 Tf 14.00 0.00 -0.00 14.00 270.63 487.95 Tm (m) Tj ET BT /F2 1 Tf 14.00 0.00 -0.00 14.00 278.69 487.95 Tm (m) Tj ET where /F6 is /Symbol and /F2 is /Helvetica. The former produces: 14.399414 0 0 14.399414 209.167969 487.277344 Tm % (Length =) elided /f-2-0 1 Tf 0.786979 -0.00461173 Td <b5>Tj /f-0-0 1 Tf 0.625025 -0.0124788 Td (m)Tj where /f-2-0 is /DQHRIK+Symbol and f-0-0 is /OJZLOW+NimbusSanL-Regu. In gorp, (m)’s start point is 8.06 units right of (μ)’s start point. In mung, (m)’s start point is 0.161954 units right of (μ)’s end point. The version of /DQHRIK+Symbol has a /mu with a width of 576 font units and a 1000 unit em. At 14.4pt that is a width of 8.294 pdf points. Gorp does not have embedded fonts, but Adobe’s AFM file for /Symbol also specified 576 font units for /mu’s width. That line of text, though is set at 14pt rather than 14.4pt, so a width of 8.064 pts. It looks like all of the text in gorp is set tighter than in mung. Perhaps using utf8 would look better: require(lattice) cairo_pdf(file="mung8.pdf", family="serif") print(xyplot(y~x,data=data.frame(x=1:10,y=1:10),main="Length = µm")) dev.off() It certainly looks better here, with sans, serif or any font which has latin and greek glyphs. To do that with Latin Modern Roman, though, I had to use U+00B5 MICRO SIGN (µ) rather than U+03BC GREEK SMALL LETTER MU. (The snippet above uses MICRO SIGN.) I think the takeaway is that cairo works better with a utf8 workflow. -JimC -- James Cloos <cl...@jhcloos.com> OpenPGP: 1024D/ED7DAEA6 ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.