\contentsline {section}{\numberline {1}Introduction}{6}
\contentsline {subsection}{\numberline {1.1}Philosophy}{6}
\contentsline {subsection}{\numberline {1.2}Getting started}{6}
\contentsline {section}{\numberline {2}GreG CookBook}{7}
\contentsline {subsection}{\numberline {2.1}Starting, Syntax and Help}{7}
\contentsline {subsection}{\numberline {2.2}Coordinates}{7}
\contentsline {subsection}{\numberline {2.3}Demonstration Procedure for \unhbox \voidb@x \hbox {\bf GreG}\ capabilities}{7}
\contentsline {subsection}{\numberline {2.4}Annotations or Using the Cursor}{11}
\contentsline {subsection}{\numberline {2.5}Getting Hardcopies}{13}
\contentsline {subsubsection}{\numberline {2.5.1}The easy way}{13}
\contentsline {subsubsection}{\numberline {2.5.2}Printable (PostScript or others) Files}{13}
\contentsline {subsubsection}{\numberline {2.5.3}Metacode File}{13}
\contentsline {subsubsection}{\numberline {2.5.4}Raster Devices}{13}
\contentsline {subsection}{\numberline {2.6}Internal Zooming}{14}
\contentsline {section}{\numberline {3}GreG Manual}{15}
\contentsline {subsection}{\numberline {3.1}Basic Concepts}{15}
\contentsline {subsubsection}{\numberline {3.1.1}Coordinate Systems}{15}
\contentsline {subsubsection}{\numberline {3.1.2}The Plot Page}{15}
\contentsline {subsubsection}{\numberline {3.1.3}The Viewing Window}{16}
\contentsline {subsubsection}{\numberline {3.1.4}The Box}{16}
\contentsline {subsubsection}{\numberline {3.1.5}The User Coordinates}{16}
\contentsline {subsection}{\numberline {3.2}The Data Structure}{16}
\contentsline {subsubsection}{\numberline {3.2.1}One-Dimensional Arrays X Y Z}{17}
\contentsline {paragraph}{Formatted Files :}{17}
\contentsline {paragraph}{Table Format :}{17}
\contentsline {subsubsection}{\numberline {3.2.2}Two-Dimensional Regular Grid Array}{17}
\contentsline {paragraph}{Variables and Images:}{17}
\contentsline {paragraph}{RGDATA File Format :}{18}
\contentsline {subsubsection}{\numberline {3.2.3}Using Variables}{19}
\contentsline {subsection}{\numberline {3.3}The Pen Attributes}{19}
\contentsline {subsubsection}{\numberline {3.3.1}Pen definition}{19}
\contentsline {subsubsection}{\numberline {3.3.2}Pen Usage and Default Settings}{20}
\contentsline {subsection}{\numberline {3.4}Characters and Markers}{20}
\contentsline {subsubsection}{\numberline {3.4.1}The Character Set}{20}
\contentsline {subsubsection}{\numberline {3.4.2}Handling Text Strings}{21}
\contentsline {subsubsection}{\numberline {3.4.3}Centering Facility}{21}
\contentsline {subsubsection}{\numberline {3.4.4}Graphic Markers}{22}
\contentsline {subsection}{\numberline {3.5}GREG1 : One Dimensional Problems}{22}
\contentsline {subsection}{\numberline {3.6}GREG2 : Two Dimensional Problems}{23}
\contentsline {subsection}{\numberline {3.7}Astronomical Mapping}{23}
\contentsline {subsection}{\numberline {3.8}The Blanking Capability}{25}
\contentsline {section}{\numberline {4}Advanced Users Guide}{27}
\contentsline {subsection}{\numberline {4.1}Greyscale and Color plots}{27}
\contentsline {subsubsection}{\numberline {4.1.1}Bitmap display of images}{27}
\contentsline {subsubsection}{\numberline {4.1.2}Filled Areas}{28}
\contentsline {subsubsection}{\numberline {4.1.3}Bitmap Color Editing}{29}
\contentsline {subsubsection}{\numberline {4.1.4}Pen Colors}{29}
\contentsline {subsubsection}{\numberline {4.1.5}Devices and Hardcopies}{30}
\contentsline {subsection}{\numberline {4.2}Plot Architecture and Multi-Window Capabilities}{30}
\contentsline {subsubsection}{\numberline {4.2.1}Directories}{30}
\contentsline {subsubsection}{\numberline {4.2.2}Windows}{31}
\contentsline {subsubsection}{\numberline {4.2.3}The {\tt CLEAR} command}{31}
\contentsline {subsubsection}{\numberline {4.2.4}Plotting Depth}{32}
\contentsline {section}{\numberline {5}GREG1 Language Internal Help}{33}
\contentsline {subsection}{\numberline {5.1}AXIS}{33}
\contentsline {subsubsection}{\numberline {5.1.1}AXIS /ABSOLUTE}{33}
\contentsline {subsubsection}{\numberline {5.1.2}AXIS /UNIT}{34}
\contentsline {subsection}{\numberline {5.2}BOX}{34}
\contentsline {subsubsection}{\numberline {5.2.1}BOX /ABSOLUTE}{34}
\contentsline {subsubsection}{\numberline {5.2.2}BOX /UNIT}{35}
\contentsline {subsection}{\numberline {5.3}COLUMN}{35}
\contentsline {subsubsection}{\numberline {5.3.1}COLUMN /FILE}{35}
\contentsline {subsubsection}{\numberline {5.3.2}COLUMN /LINES}{35}
\contentsline {subsubsection}{\numberline {5.3.3}COLUMN /TABLE}{36}
\contentsline {subsubsection}{\numberline {5.3.4}COLUMN /COMMENT}{36}
\contentsline {subsection}{\numberline {5.4}CONNECT}{36}
\contentsline {subsubsection}{\numberline {5.4.1}CONNECT /FILL}{36}
\contentsline {subsection}{\numberline {5.5}CURVE}{36}
\contentsline {subsubsection}{\numberline {5.5.1}CURVE /ACCURACY}{37}
\contentsline {subsubsection}{\numberline {5.5.2}CURVE /VARIABLE}{37}
\contentsline {subsubsection}{\numberline {5.5.3}CURVE /PERIODIC}{37}
\contentsline {subsubsection}{\numberline {5.5.4}CURVE /BLANKING}{38}
\contentsline {subsection}{\numberline {5.6}DRAW}{38}
\contentsline {subsubsection}{\numberline {5.6.1}DRAW /BOX}{39}
\contentsline {subsubsection}{\numberline {5.6.2}DRAW /CHARACTER}{39}
\contentsline {subsubsection}{\numberline {5.6.3}DRAW /USER}{39}
\contentsline {subsubsection}{\numberline {5.6.4}DRAW /CLIP}{39}
\contentsline {subsubsection}{\numberline {5.6.5}DRAW RELOCATE}{39}
\contentsline {subsubsection}{\numberline {5.6.6}DRAW LINE}{40}
\contentsline {subsubsection}{\numberline {5.6.7}DRAW MARKER}{40}
\contentsline {subsubsection}{\numberline {5.6.8}DRAW ARROW}{40}
\contentsline {subsubsection}{\numberline {5.6.9}DRAW TEXT}{40}
\contentsline {subsubsection}{\numberline {5.6.10}DRAW VALUE}{40}
\contentsline {subsection}{\numberline {5.7}ERRORBAR}{40}
\contentsline {subsection}{\numberline {5.8}HISTOGRAM}{41}
\contentsline {subsubsection}{\numberline {5.8.1}HISTOGRAM /FILL}{41}
\contentsline {subsection}{\numberline {5.9}LABEL}{41}
\contentsline {subsubsection}{\numberline {5.9.1}LABEL /X}{42}
\contentsline {subsubsection}{\numberline {5.9.2}LABEL /Y}{42}
\contentsline {subsubsection}{\numberline {5.9.3}LABEL /APPEND}{42}
\contentsline {subsubsection}{\numberline {5.9.4}LABEL /CENTERING}{42}
\contentsline {subsection}{\numberline {5.10}Language}{42}
\contentsline {subsubsection}{\numberline {5.10.1}Language NEWS}{43}
\contentsline {subsection}{\numberline {5.11}LIMITS}{43}
\contentsline {subsubsection}{\numberline {5.11.1}LIMITS /BLANKING}{44}
\contentsline {subsubsection}{\numberline {5.11.2}LIMITS /REVERSE}{44}
\contentsline {subsubsection}{\numberline {5.11.3}LIMITS /RGDATA}{44}
\contentsline {subsubsection}{\numberline {5.11.4}LIMITS /XLOG}{45}
\contentsline {subsubsection}{\numberline {5.11.5}LIMITS /YLOG}{45}
\contentsline {subsubsection}{\numberline {5.11.6}LIMITS /VARIABLES}{45}
\contentsline {subsection}{\numberline {5.12}PENCIL}{45}
\contentsline {subsubsection}{\numberline {5.12.1}PENCIL COLORS}{45}
\contentsline {subsection}{\numberline {5.13}POINTS}{46}
\contentsline {subsection}{\numberline {5.14}RULE}{46}
\contentsline {subsubsection}{\numberline {5.14.1}RULE /MAJOR}{47}
\contentsline {subsubsection}{\numberline {5.14.2}RULE /MINOR}{47}
\contentsline {subsection}{\numberline {5.15}SET}{47}
\contentsline {subsubsection}{\numberline {5.15.1}SET ANGLE\_UNIT}{47}
\contentsline {subsubsection}{\numberline {5.15.2}SET BLANKING}{47}
\contentsline {subsubsection}{\numberline {5.15.3}SET BOX\_LOCATION}{48}
\contentsline {subsubsection}{\numberline {5.15.4}SET CENTERING}{48}
\contentsline {subsubsection}{\numberline {5.15.5}SET CHARACTER}{48}
\contentsline {subsubsection}{\numberline {5.15.6}SET COORDINATES}{49}
\contentsline {subsubsection}{\numberline {5.15.7}SET DECIMAL}{49}
\contentsline {subsubsection}{\numberline {5.15.8}SET EXPAND}{49}
\contentsline {subsubsection}{\numberline {5.15.9}SET FONT}{49}
\contentsline {subsubsection}{\numberline {5.15.10}SET MARKER}{49}
\contentsline {subsubsection}{\numberline {5.15.11}SET ORIENTATION}{50}
\contentsline {subsubsection}{\numberline {5.15.12}SET PLOT\_PAGE}{50}
\contentsline {subsubsection}{\numberline {5.15.13}SET SEXAGESIMAL}{50}
\contentsline {subsubsection}{\numberline {5.15.14}SET SYSTEM}{51}
\contentsline {subsubsection}{\numberline {5.15.15}SET TICKSIZE}{51}
\contentsline {subsubsection}{\numberline {5.15.16}SET VIEWPORT}{51}
\contentsline {subsection}{\numberline {5.16}SHOW}{51}
\contentsline {subsection}{\numberline {5.17}SORT}{52}
\contentsline {subsection}{\numberline {5.18}TICKSPACE}{52}
\contentsline {subsection}{\numberline {5.19}VALUES}{52}
\contentsline {section}{\numberline {6}GREG2 Language Internal Help}{53}
\contentsline {subsection}{\numberline {6.1}CONVERT}{53}
\contentsline {subsection}{\numberline {6.2}ELLIPSE}{53}
\contentsline {subsection}{\numberline {6.3}EXTREMA}{54}
\contentsline {subsection}{\numberline {6.4}GRID}{54}
\contentsline {subsection}{\numberline {6.5}LEVELS}{54}
\contentsline {subsection}{\numberline {6.6}MASK}{55}
\contentsline {subsection}{\numberline {6.7}MEAN}{55}
\contentsline {subsection}{\numberline {6.8}PERSPECTIVE}{55}
\contentsline {subsection}{\numberline {6.9}PLOT}{56}
\contentsline {subsubsection}{\numberline {6.9.1}PLOT /BLANKING}{56}
\contentsline {subsubsection}{\numberline {6.9.2}PLOT /LIMITS}{56}
\contentsline {subsubsection}{\numberline {6.9.3}PLOT /POSITION}{57}
\contentsline {subsubsection}{\numberline {6.9.4}PLOT /SCALING}{57}
\contentsline {subsubsection}{\numberline {6.9.5}PLOT /VISIBLE}{57}
\contentsline {subsubsection}{\numberline {6.9.6}PLOT IMAGE\_HOWTO}{57}
\contentsline {subsection}{\numberline {6.10}POLYGON}{58}
\contentsline {subsection}{\numberline {6.11}PROJECTION}{59}
\contentsline {subsection}{\numberline {6.12}RANDOM\_MAP}{60}
\contentsline {subsubsection}{\numberline {6.12.1}RANDOM\_MAP /NEIGHBOURS}{60}
\contentsline {subsubsection}{\numberline {6.12.2}RANDOM\_MAP /TRIANGLES}{60}
\contentsline {subsubsection}{\numberline {6.12.3}RANDOM\_MAP /EXTRAPOLATE}{61}
\contentsline {subsubsection}{\numberline {6.12.4}RANDOM\_MAP /BLANKING}{61}
\contentsline {subsection}{\numberline {6.13}RESAMPLE}{61}
\contentsline {subsection}{\numberline {6.14}RGDATA}{61}
\contentsline {subsubsection}{\numberline {6.14.1}RGDATA /FORMAT}{62}
\contentsline {subsubsection}{\numberline {6.14.2}RGDATA FILE\_FORMAT}{62}
\contentsline {subsection}{\numberline {6.15}RGMAP}{63}
\contentsline {subsubsection}{\numberline {6.15.1}RGMAP MEMORY\_OPTIONS}{64}
\contentsline {subsubsection}{\numberline {6.15.2}RGMAP /PERCENT}{64}
\contentsline {subsubsection}{\numberline {6.15.3}RGMAP /ABSOLUTE}{64}
\contentsline {subsubsection}{\numberline {6.15.4}RGMAP /BLANKING}{64}
\contentsline {subsubsection}{\numberline {6.15.5}RGMAP /GREY}{65}
\contentsline {subsubsection}{\numberline {6.15.6}RGMAP /KEEP}{65}
\contentsline {subsubsection}{\numberline {6.15.7}RGMAP /PENS}{65}
\contentsline {subsection}{\numberline {6.16}STRIP}{65}
\contentsline {subsection}{\numberline {6.17}WEDGE}{66}
\contentsline {subsection}{\numberline {6.18}WRITE}{66}
\contentsline {section}{\numberline {7}GTVL Language Internal Help}{68}
\contentsline {section}{\numberline {8}GreG Plot Library}{69}
\contentsline {section}{\numberline {9}GreG Character Set}{70}