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この節では GNUPLOT の ox サーバ ox_sm1_gnuplot
とのインタフェース関数を解説する.
これらの関数はファイル ‘gnuplot.rr’ で定義されている.
gnuplot.rr は
‘$(OpenXM_HOME)/lib/asir-contrib/’ にある.
1.1.1 gnuplot.start | ||
1.1.2 gnuplot | ||
1.1.3 gnuplot.plot_dots | ||
1.1.4 gnuplot.heat | ||
1.1.6 gnuplot.plot_function | ||
1.1.5 gnuplot.output | ||
1.1.8 gnuplot.setenv | ||
1.1.7 gnuplot.stop |
[255] gnuplot.start();
0
[257] gnuplot.gnuplot("plot sin(x**2);");
0
関数
gnuplot.heat(dt,step) はわれわれの GNUPLOT インタフェース関数のデモ
である.
この関数は熱伝導方程式
区間 [0,1] は Heat_N 個に分割される.
static 変数 Heat_N は
関数 gnuplot.set_heat_N で設定する.
有名な Courant-Friedrichs-Levi 数
dt*Heat_N*Heat_N が 0.5 以下であれば,
陽的差分スキームは安定である.
CFL を変えることにより, 不安定性が生じるのを観察できる.
gnuplot.set_heat_N(20); gnuplot.heat(0.001,30); (CFL number is 0.4) gnuplot.set_heat_N(20); gnuplot.heat(0.003,30); (CFL > 0.5 unstable)
Author of GNUPLOT: Thomas Williams, Colin Kelley.
http://www.gnuplot.info
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gnuplot.start:: Localhost で ox_sm1_gnuplot を起動する.
整数
ox_sm1_gnuplot を起動する.
起動された ox_sm1_gnuplot の識別番号を戻す.
Xm_noX =1 としておくと, ox_sm1_gnuplot 用の debug window が開かない.
Gnuplot_proc に格納される.
P = gnuplot.start();
ox_launch, gnuplot
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gnuplot:: GNUPLOT にコマンド s を実行してもらう.
なし
数
文字列
ox_sm1_gnuplot は自動的に GNUPLOT 本体をリスタートする.
^ をうけつけない. かわりに, ** を使う.
[232] P = gnuplot.start();
0
*Plot 3 dimensional graph.
[233] gnuplot.gnuplot("splot x**2-y**2;"|proc=P);
0
*Plot 2 dimensional graph.
[234] gnuplot.gnuplot("plot [-pi:pi] [-2:2] cos(x);");
0
*Output a graph as a postscript figure.
[235] gnuplot.output(|file="hoge.eps");
0
[236] gnuplot.gnuplot("plot sin(x)*cos(x);");
0
[237] gnuplot.gnuplot(|file="x11");
0
*Plot 3 dimensional graph hiding unvisible lines.
[236] gnuplot.gnuplot("set hidden3d");
0
[237] gnuplot.gnuplot("splot (x**2+y**2)*sin(x**2+y**2)");
0
[238] gnuplot.gnuplot("set isosamples 50");
0
[239] gnuplot.gnuplot("splot (x**2+y**2)*sin(x**2+y**2)");
ox_launch, gnuplot.start, rtostr,
gnuplot.plot_dots
矢吹道郎, 大竹つよし; 使いこなす GNUPLOT, テクノプレス, ISBN4-924998-11-7
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gnuplot.plot_dots:: 点の集合 d をスタイル s でプロットする.
なし
数
リスト
文字列 または 0
[ ] のときはスクリーンがまず消去される.
[239] P = gnuplot.start(); 0 [240] gnuplot.plot_dots([ ],0); 0 [241] for (I=0; I<10; I++) gnuplot.plot_dots([[I,I^2]]," lines "); [242] A = [ ]; [] [243] for (I=0; I<10; I++) A = append(A,[ [I,I^2]]); [244] A; [[0,0],[1,1],[2,4],[3,9],[4,16],[5,25],[6,36],[7,49],[8,64],[9,81]] [245] gnuplot.plot_dots(A," lines "); 0
gnuplot.start, plot "fileName" with options(GNUPLOT command),
gnuplot.clean, gnuplot
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gnuplot.heat:: 熱伝導方程式を数値的に解く.
なし
浮動小数点数
整数
pde_heat_demo と呼ばれる予定.
[232] gnuplot.set_heat_N(20)$ [233] gnuplot.heat(0.001,30)$
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gnuplot.output:: GNUPLOT にファイル s へポストスクリプトで出力するように頼む.
Void
String
GNUPLOT にファイル s へポストスクリプトで出力するように頼む.
s が "x11" または, この関数を引数無しでよぶと,
以後, X11 の display に graphics が出力される.
[273] gnuplot.output(|file="hoge.eps");
Graphic output of GNUPLOT will be written to hoge.eps as a Poscript file.
0
[274] gnuplot.gnuplot("plot tan(x)+sin(x);");
0
[275] gnuplot.output();
Usage of gnuplot.output: gnuplot.output(|file="string")
gnuplot.output(|file="x11")
Output device is set to X11
gnuplot
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gnuplot.plot_function:: gnuplot サーバに f のグラフを書くように頼む.
なし
数
多項式または多項式のリスト
gnuplot サーバに f のグラフを書くように頼む.
[290] gnuplot.plot_function((x+sin(x))^2); 0 [291] gnuplot.plot_function([x,x^2,x^3]); 0
gnuplot.to_gnuplot_format
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gnuplot.stop:: GNUPLOT を停止し, 通信用の fifo ファイルを消す.
Void
String
GNUPLOT を停止し, 一時ディレクトリの下に作成された通信用の fifo ファイルを消す.
[273] gnuplot.stop()
gnuplot.start
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gnuplot.setenv::
Void
String
Object
key は "gnuplot.callingMethod" または "plot.gnuplotexec".
Use the old method to communicate with gnuplot (version 3).
This method does not use mkfifo, but we need a patched version of gnuplot.
[273] gnuplot.setenv("gnuplot.callingMethod",0);
[274] gnuplot.setenv("plot.gnuplotexec",getenv("OpenXM_HOME")+"/bin/gnuplot4ox");
Calling your own gnuplot binary.
[274] gnuplot.setenv("plot.gnuplotexec","/cygdrive/c/program files/gnuplot/pgnuplot.exe");
gnuplot.start
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