Practically all PostScript interpreters out there either include the 13
standard fonts

  - Times (Roman, Italic, Bold, Bold Italic)
  - Helvetica (Regular, Oblique, Bold, Bold Oblique)
  - Courier (Regular, Oblique, Bold, Bold Oblique)
  - Symbol

(listed in Appendix E of the PostScript Language Reference Manual) or
are automatically able to map these to equivalent and compatible
alternative fonts. This has been common practice for nearly three
decades now.

So I think it is inappropriate for dvips to attempt to map one the above
13 standard PostScript fonts, or complain about there use. This is
clearly the job of the PostScript interpreter later in the pipeline.

So this bug report is in my opinion very clearly an issue with dvips,
not a bug with R (or with any of the other thousands of EPS-generating
tools out there that rely on the recipient to know the standard
PostScript). Please reassign it back to texlive-base.

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https://bugs.launchpad.net/bugs/193913

Title:
  Font Helvetica is not in the mapping file.

Status in “r-base” package in Ubuntu:
  Confirmed
Status in “texlive-base” package in Ubuntu:
  Invalid

Bug description:
  dvips complains about missing fonts:

  dvips: Font Helvetica used in file figures.eps is not in the mapping file.
  dvips: Font Helvetica-Bold used in file figures.eps is not in the mapping 
file.
  dvips: Font Helvetica-Oblique used in file figures.eps is not in the mapping 
file.
  dvips: Font Helvetica-BoldOblique used in file figures.eps is not in the 
mapping file.
  dvips: Font Symbol used in file figures.eps is not in the mapping file.

  The EPS files were generated using R.

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