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Article contents:== plot An interface to the GNU libplot library. [[toc:]] == Usage (import plot) == Documentation {{libplot}} is a part of the [[http://www.gnu.org/software/plotutils/|GNU plotutils]] package. It is a 2-D vector graphics library capable of exporting to many file formats, both vector and raster. The Chicken {{plot}} library provides a Scheme interface to a large subset of the {{libplot}} procedures. This interface follows closely the {{libplot}} API, so the main reference is the [[http://www.gnu.org/software/plotutils/manual/en/index.html|plotutils]] manual. In {{libplot}}, function names are of the form {{pl_function_r}}. The Scheme corresponding function name is {{function}}. Below is a list of procedures that are included in this egg, along with brief descriptions. This egg has been tested with {{plotuils}} version 2.6. === Data types and constructors === Creating and deleting plotters === Control functions === Object drawing functions == Examples (import plot) (define (ccurve plotter maxorder dx dy order) (if (>= order maxorder) (fcontrel plotter dx dy) (begin (ccurve plotter maxorder (* 0.5 (- dx dy)) (* 0.5 (+ dx dy)) (+ order 1)) (ccurve plotter maxorder (* 0.5 (+ dy dx)) (* 0.5 (- dy dx)) (+ order 1))) )) (define (simple-test plotter max-order) (openpl plotter) (fspace plotter 0. 0. 1000. 1000.) (flinewidth plotter 0.25 ) (pencolorname plotter "blue" ) (erase plotter ) (fmove plotter 600. 300. ) (ccurve plotter max-order 0. 400. 0 ) (closepl plotter) ) (define (main) (print "libplot version: " (libplot-version)) (let ((plotter (make-plotter (PNG) (open-output-file "testplot.png") (list (PAGESIZE "A4") (INTERLACE #t) (X_AUTO_FLUSH #f) (META_PORTABLE #t))))) (simple-test plotter 5) (delete-plotter plotter))) (main) == About this egg === Author [[/users/ivan-raikov|Ivan Raikov]] === Version history ; 1.1 : Added matchable and datatype as dependencies (thanks to Mario Domenech Goulart) ; 1.0 : Initial release === License Copyright 2011 Ivan Raikov. Based on the Ocamlplot library by Olivier Andrieu. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. A full copy of the GPL license can be found at <http://www.gnu.org/licenses/>. Description of your changes:

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