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SAS/GRAPH

SAS/GRAPH. The Basics. Today’s Topics. GOPTIONS GPLOT GCHART GCONTOUR G3D. Getting Started in SAS/GRAPH. GOPTIONS: Similar to OPTION, but specific to SAS/GRAPH Gives instructions about appearance of graphs Applies for entire SAS session or until reset within a session

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SAS/GRAPH

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  1. SAS/GRAPH The Basics

  2. Today’s Topics • GOPTIONS • GPLOT • GCHART • GCONTOUR • G3D

  3. Getting Started in SAS/GRAPH • GOPTIONS: • Similar to OPTION, but specific to SAS/GRAPH • Gives instructions about appearance of graphs • Applies for entire SAS session or until reset within a session • Can appear anywhere in program, but preferably within SAS/GRAPH procedure Example 5.1.1

  4. GPLOT:Creating a Scatter Plot • Procedure GPLOT • PROC GPLOT DATA=dataset; • PLOT y*x(=z)/options; • RUN; • QUIT; Examples 5.2.1, 5.2.2

  5. SYMBOL Statement • Controls appearance of symbols in graph • Options include: • VALUE= (V=) • INTERPOL= (I=) • COLOR= (C=) • LINE= (L=) Example 5.3.1

  6. The OVERLAY and LEGEND options • Appear after slash (/) in PLOT statement • OVERLAY used when PLOT has more than one X or Y • OVERLAY cannot be used with form y*x=z • LEGEND option causes legend to print • Legend prints automatically with y*x=z form, but not with OVERLAY option

  7. AXIS Statement • Controls appearance of axes • Define which axis with VAXIS= and HAXIS= options in PLOT statement • Some options available include: • LABEL= • ORDER= • VALUE= • MINOR= • MAJOR= Example 5.3.2

  8. GCHART • Horizontal Bar Charts (2D and 3D) • Vertical Bar Charts (2D and 3D) • Pie Charts (2D and 3D) • Block Charts • Star Charts

  9. Creating a Histogram • Use the VBAR statement • Options include: • Specifying midpoints • Changing patterns in bars Examples 5.4.1, 5.4.2

  10. Creating Horizontal and Vertical Bar Frequency Charts • Statements are VBAR and HBAR • When data are counts, use FREQ= option Example 5.4.3

  11. Cross-Classification in Charts • Classify bars by 2 variables instead of just one • List one variable in HBAR or VBAR statement • List second variable in GROUP= option Example 5.4.5

  12. Plots of 3D Data • Contour plot (Y*X=Z format) • Y-variable defines y-axis • X-variable defines x-axis • Z-variable defines levels of contours • 3-D Plot (Y*X=Z format) • Y-variable defines y-axis • X-variable defines x-axis • Z-variable defines z-axis • Scatter plot or Surface plot Examples 5.6.1, 5.6.2

  13. Contour Plots • PROC GCONTOUR • Options available include: • LEVELS: levels of contours • LLEVELS: line types of contours • HAXIS, VAXIS: same as GPLOT • HREF, VREF: draws reference lines • LEGEND: same as before

  14. 3-D Plots • PROC G3D • Surface plot: PLOT statement • Scatter plot: SCATTER statement • Options available with only the PLOT statement: • CTOP, CBOTTOM: color of top and bottom of surface • Options available with only the SCATTER statement: • SHAPE: defines shapes of symbols • COLOR: defines color of symbols

  15. Options with PLOT or SCATTER in G3D • ROTATE: rotates graph specified # of degrees • TILT: tilts graph specified # of degrees (must be between 0 and 90) • XTICKNUM, YTICKNUM: defines # of tick marks • CAXIS: color of axes • ZMAX, ZMIN: defines min and max values for z-axis • GRID: draws grid “walls” Examples 5.6.3, 5.6.4, 5.6.5

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