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

Statistical graphics for publication – easy ways to meet requirements for high resolution. Jim Flewelling Growth Model Users Group February 11, 2008. OUTLINE. Resolution specifications Advice: Ignore the specifications Graphics Files & Software Create and View Bitmaps References.

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

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  1. Statistical graphics for publication – easy ways to meet requirements for high resolution Jim Flewelling Growth Model Users Group February 11, 2008

  2. OUTLINE • Resolution specifications • Advice: Ignore the specifications • Graphics Files & Software • Create and View Bitmaps • References Learn from my mistakes!

  3. Resolution Specifications The preferred resolution of all graphs (when printed) is 600 to 1200 dots per inch; the minimum acceptable resolution is 300 dpi.

  4. Advice (short and sweet) “If you are producing an EPS file, you don’t 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.

  5. 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. Problem and Advice

  6. Example with SPSS 15 SPSS output (can be edited or exported)

  7. .eps dropped into PowerPoint

  8. SPSS created bitmap (.bmp)

  9. .eps converted to 600 dpi bitmap Windows metafile or SPSS direct paste would look the same.

  10. 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.

  11. 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.

  12. References • SYSTAT - SIGMAPLOT. www.systat.com/products/sigmaplot/?sec=1102 • SAS TS-674. Introduction to exporting SAS/Graph output to Microsoft office.Support.sas.com/techsup/technote/ts674/ts674.html • Elsevier “for authors” file formatswww.elsevier.com/wps/find/authorsview.authors/file_formats • Ghostview. pages.cs.wisc.edu/~ghost/gsview/

  13. YOUR COMMENTS? HINTS? EXPERIENCES?

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