Statistical graphics for publication easy ways to meet requirements for high resolution

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Statistical graphics for publication easy ways
to meet requirements for high resolution

• Jim Flewelling
• Growth Model Users Group
• February 11, 2008

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OUTLINE

• Resolution specifications
• Advice Ignore the specifications
• Graphics Files Software
• Create and View Bitmaps
• References

Learn from my mistakes!
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Resolution Specifications
The preferred resolution of all graphs (when
printed) is 600 to 1200 dots per inch the
minimum acceptable resolution is 300 dpi.
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Advice (short and sweet)
If you are producing an EPS file, you dont need
to pay attention to dpi at all. dpi is a
completely misleading term. It refers to how
many pixels per inch are used in printing. -
Systat Software Inc.
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Problem and Advice

• Graphics software often has unstated resolution.
• Output file types with stated resolution may be
  as low as 96 dpi.
• Use vector output formats (no resolution)
• Encapsulated postscript (.eps)
• Enhanced Metafile (.emf)
• Use scalable fonts (preferably postscript).
• Convert to TIFF only if needed.

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Example with SPSS 15
SPSS output (can be edited or exported)
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(No Transcript)
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.eps dropped into PowerPoint
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SPSS created bitmap (.bmp)
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.eps converted to 600 dpi bitmap
Windows metafile or SPSS direct paste would look
the same.
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Conversion Software (.eps to .bmp or .tiff)

• Photoshop (Expensive, compresses)
• GSview is a graphical interface for Ghostscript
  under MS-Windows, OS/2 and GNU/Linux. Ghostscript
  is an interpreter for the PostScript page
  description language used by laser printers.
• MS PAINT can be used to view the bitmap files.
• Or COPY .eps file to PS printer use magnifying
  glass.

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Gsview (Ghostgum Software)

• Converts PostScript or PDF to bitmaps, PostScript
  or PDF.
• Extracts a range of pages to be copied from a
  PostScript document.
• PS to EPS allows the bounding box to be updated
  and allows the header to be changed from PS to
  EPS.
• EPS Preview adds a bitmap preview to an EPS file.
  (publisher may require this)
• Extracts the PostScript or Preview from a DOS EPS
  file.
• Edit Convert to vector format uses pstoedit to
  convert PostScript or PDF to an editable vector
  format.
• Edit Text Extract uses pstotext to extract text
  from a PostScript or PDF document.
• Edit Copy copies the display bitmap to the
  clipboard. Edit Paste To copies a clipboard DIB
  bitmap to a file.
• Edit Convert Bitmap converts a clipboard DIB
  bitmap to a clipboard device dependent bitmap.

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References

• SYSTAT - SIGMAPLOT. www.systat.com/products/sigma
  plot/?sec1102
• SAS TS-674. Introduction to exporting SAS/Graph
  output to Microsoft office.Support.sas.com/techsu
  p/technote/ts674/ts674.html
• Elsevier for authors file formatswww.elsevier.c
  om/wps/find/authorsview.authors/file_formats
• Ghostview. pages.cs.wisc.edu/ghost/gsview/

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YOUR COMMENTS? HINTS? EXPERIENCES?