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Introduction to SAS/Graph 9.2

Introduction to SAS/Graph 9.2. Ken Barz Ken.barz@cpcmed.org Colorado Prevention Center 22Oct2009. In the Beginning, there was. Base SAS: Proc plot listing output only Think stick figures on a line printer SAS/Graph 6-9.1.3: proc gplot ODS output as of SAS 8

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Introduction to SAS/Graph 9.2

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  1. Introduction to SAS/Graph 9.2 Ken Barz Ken.barz@cpcmed.org Colorado Prevention Center 22Oct2009

  2. In the Beginning, there was • Base SAS: Proc plot • listing output only • Think stick figures on a line printer • SAS/Graph 6-9.1.3: proc gplot • ODS output as of SAS 8 • Color graphics, sometimes crude, extra $$$ • Complex  steep learning curve

  3. The “Typical” SAS Programmer • Knowledge of data and proc steps • Able to use libname, filename, title and footnote statements • Statistical and reporting procedures • Maybe some ODS and macro language

  4. Learning SAS/Graph 6 – 9.1.3 • Open code vs. run groups • Catalogs, grseg files, SAS registry, and hardware devices. • Options, goptions, greplay, symbols, axes, legends, line types, interpolation parameters, fonts, ODS, annotate, and …

  5. The SAS/Graph 9.2 Approach (Do-Overs!) • Template-based graphics as opposed to device-based graphics. (e.g. proc template) • Default output is to an industry standard (e.g. ODS listing destination=PNG file.) • Full integration with ODS • Output catalogs, grsegs, devices, goptions, annotate, global statements… all go away

  6. The SAS/Graph 9.2 Approach (cont: Main Elements) • Proc Template • Statistical Graphics (SG) Procedures • ODS Graphics Statement • ODS Graphics Editor/Designer • Graph Template Language (GTL)

  7. Learning Proc Template via ODS • Learn the majority of ODS • Use ODS Trace to determine SAS output objects • Learn the capabilities and syntax of proc template • Figure out how to combine it all

  8. (Proc) Template-Based Graphics (SAS 9.2 +) • Output is produced from a compiled ODS template of type STATGRAPH (other types include TABLE, COLUMN, FOOTER, HEADER, CROSSTABS, CELLVALUE, STYLE, TAGSET) • Statistical Graphics procedures use templates (sgplot, sgpanel, …) provided by SAS • Custom templates may be created with Proc Template, the Graphics Template Language (GTL) and Proc sgrender.

  9. Minimum Template Code(defaults to sasuser.templat catalog) proctemplate; define statgraphmytemplate; begingraph; layout overlay; endlayout; endgraph; end; run;

  10. Benefits of Template-Based 9.2 Graphics • Graphics are clean, easy to code and produce • Sizing determined by aspect ratio, not hardware device • Tight integration with ODS, Styles and RTF/Unicode syntax • Attributes cycle automatically • Complex output is easily achieved

  11. Statistical Graphics Procedures • SGPlot • SGPanel • SGScatter • SGRender

  12. Statistical Graphics Procedures (cont) Support for: • By group processing • Formats/Titles/Footnotes/Labels • ODS Graphics statement manages settings

  13. ODS Graphics Statement • Controls the runtime environment for producing template-based graphs • Similar to the old goptions statement (with fewer options) • Options for reset, size, image name and format, scale, dpi, antialiasing, … • Enables the creation of default Statistical Procedure graphs

  14. The ODS Graphics Editor/Designer (9.2 Phase 2) • Interactively add, edit or delete titles, footnotes, super/subscripts, labels, lines, symbols, … • Change the style or the size of the graph • Add annotation to the graph • Available within SAS or as a stand-alone downloadable application

  15. Graph Template Language Creating a graph using GTL involves: • Defining the structure of the graph using the GTL syntax in a STATGRAPH template that is specified on the TEMPLATE procedure. • Creating the graph by running the SGRENDER procedure to associate the appropriate data with the template.

  16. Graph Template Language (cont) Graph layout options include: • Overlay • Gridded/Lattice • Datapanel • OverlayEquated • Overlay3D

  17. Graph Template Language (cont) Graph templates allow customization of: • Titles, footnotes, row and column headers, sidebars and text entries. • Linear, time and log axes. • Styles and attributes. • Appearance of grouped and non-grouped data.

  18. Graph Template Language (cont) Graph templates also allow the use of: • Dynamics • Macro variables • Conditional logic, expressions and functions

  19. Conclusion • In version 9.2, SAS/Graph has been completely re-written to a template-based orientation. • Clean and intricate graphs can now be produced via a straight forward coding method. • The old approaches to SAS/Graph still mostly work as well. • Thank you!

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