GLE

GLE is a graphics language that produces PostScript, EPS, PDF, PNG, or JPG ouput from a simple script file
The GLE scripting language is a full featured language with variables, logic control, looping, subroutines, and graphing tools. GLE is great for plotting and charting data.

GLE can create very complex output with text and graphics (including graphs and charts) from a simple plain text file.

GLE has a full range of facilities for producing publication-quality graphs, diagrams, posters and slides. GLE provides LaTeX quality fonts together with a flexible graphics module, which allows the user to specify any feature of a graph (down to the line width of the subticks, for example).

Complex pictures can be drawn with user-defined subroutines and simple looping structures. Essentially, GLE is a scripting language and if you are used to writing software, using LaTeX, or any other non-WYSIWYG tools, then you will enjoy using GLE.

What's New in This Release:

Includes a GUI called QGLE (written by A. S. Budden)

- displays the output of GLE and updates automatically after the source file is modified (run "gle -p myfile.gle")

- has basic editing tools (add amove/line/circle/...)

- QGLE is based on the QT and Ghostscript library

Added GNU autoconf support (in addition to the regular makefile.os system)

(on Linux, one can now compile with ./configure; make; make install)

Added autopackage support

UTF8 support (limited to latin characters with accents)

LaTeX expressions are scaled to the current font height

(set texscale none/fixed/scale)

LaTeX expressions are used in key and graph blocks (set texlabels 1)

The "begin box / end box" block now fills underneath its contents

Added keyword "local" to define local variables

(see e.g., Examples | Fractals | Sierpinski on the website)

Added "colormap" command (regular and graph block)

(see e.g., Examples | 3D plots | Information Gain on the website)

Colormap works for functions and for .z files

Added option "-v" to run another version of GLE

(if more than one version is installed, use "gle -help v" to list installed versions)

Added "begin object name" and "end object" to define objects

Added "draw name.pos" to draw objects

More sensible defaults for graph font sizes

(use gle -cmode 3.0 to get the old defaults)

Font size in graph now depends on the "hei" setting

Added new set subcommands: titlescale, atitlescale, ticksscale, atitledist, alabeldist

(to set font sizes and distances relative to the value of the "hei" setting)

Distance between axis labels and title are better calculated

Added "margins", "dist", "coldist" and "row" options to key block

Added "scale h v" command to graph block, which is equivalent to a hscale/vscale pair

Added colored fill patterns for the "bar" command and key block

bar d1,d2,d3,d4 fill blue,red,blue,purple pattern none,shade,grid,shade2

Added "xnames from di" to retrieve the axis labels from a data set

Added "xnoticks p1 p2 ..." to disable ticks at specified positions

Added "ftick x0" to "axis" to manually set the position of the first tick

Added "offset y0" to "axis" to move the origin of the axis

Added "angle a" to "axis" to rotate the axis labels

Added "x0axis" and "y0axis" (these are disabled by default)

Added option "center" to center a graph block

Added option "math" to create a "math mode" graph with the axis crossing at the origin

(see e.g., Examples | 2D Simple | Sin on the website)

Added option "horiz" to bar command allowing "horizontal" bar plots

Added option "style" to bar command allowing user defined bar styles

(see e.g., Examples | 2D Complex | Color Bar on the website)

Added arrow styles "filled", "empty" and "simple"

Added support for user defined arrow styles

(see e.g., Examples | Other | Arrow Styles on the website)

Added function xbar(xp,i) retrieving the x-coordinate of bar i in a bar plot

Added function xy2angle(dx,dy) that computes the angle (polar coords) given dx and dy

Added function sdiv(x,y) implementing y == 0.0 ? 0.0 : x / y

Added formatting modes "pi" and "frac" to format$

(see e.g., Examples | 2D Simple | Sin on the website)

Subroutine definitions and assignments can come before the size command

Checks for correct nesting of all block commands

While loops are now also supported (besides until ... next loops)

Support for single line then/else blocks allowing code such as

if a < 1 then print a "is smaller than 1"

else if a < 2 then print a "is smaller than 2 but larger than 1"

else if a < 3 then print a "is smaller than 3 but larger than 2"

else print a "is larger than 3"

LaTeX expressions can now also be used in combination with .ps output

Axis scales are now computed based on the datasets that are actually used

Graph block can include function calls, of which the output is clipped to the graph window

(see e.g., Examples | 2D Complex | Labeled Scatter on the website)

The manip utility has been integrated back into the GLE distribution

(see e.g., this screenshot of manip).

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