/usr/share/doc/libplplot11/examples/ocaml/x14.ml is in libplplot-dev 5.9.9-2ubuntu2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 | (* $Id: x14.ml 11680 2011-03-27 17:57:51Z airwin $
Demo of multiple stream/window capability (requires Tk or Tcl-DP).
Maurice LeBrun
IFS, University of Texas at Austin
Copyright (C) 2004 Alan W. Irwin
Copyright (C) 2008 Hezekiah M. Carty
This file is part of PLplot.
PLplot is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published
by the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
PLplot 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with PLplot; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*)
open Printf
open Plplot
let pi = atan 1.0 *. 4.0
let space0 = [||]
let mark0 = [||]
let space1 = [|1500|]
let mark1 = [|1500|]
let plot1 xscale yscale xoff yoff =
let x =
Array.init 60 (fun i -> xoff +. xscale *. float_of_int (i + 1) /. 60.0)
in
let y = Array.init 60 (fun i -> yoff +. yscale *. x.(i)**2.0) in
let xmin = x.(0) in
let xmax = x.(59) in
let ymin = y.(0) in
let ymax = y.(59) in
let xs = Array.init 6 (fun i -> x.(i * 10 + 3)) in
let ys = Array.init 6 (fun i -> y.(i * 10 + 3)) in
(* Set up the viewport and window using PLENV. The range in X is *)
(* 0.0 to 6.0, and the range in Y is 0.0 to 30.0. The axes are *)
(* scaled separately (just = 0), and we just draw a labelled *)
(* box (axis = 0). *)
plcol0 1;
plenv xmin xmax ymin ymax 0 0;
plcol0 6;
pllab "(x)" "(y)" "#frPLplot Example 1 - y=x#u2";
(* Plot the data points *)
plcol0 9;
plpoin xs ys 9;
(* Draw the line through the data *)
plcol0 4;
plline x y;
plflush ();
()
let plot2 () =
(* Set up the viewport and window using PLENV. The range in X is -2.0 to
10.0, and the range in Y is -0.4 to 2.0. The axes are scaled separately
(just = 0), and we draw a box with axes (axis = 1). *)
plcol0 1;
plenv (-2.0) 10.0 (-0.4) 1.2 0 1;
plcol0 2;
pllab "(x)" "sin(x)/x" "#frPLplot Example 1 - Sinc Function";
(* Fill up the arrays *)
let x = Array.init 100 (fun i -> (float_of_int i -. 19.0) /. 6.0) in
let y =
Array.map (fun xi -> if xi <> 0.0 then sin xi /. xi else 1.0) x
in
(* Draw the line *)
plcol0 3;
plline x y;
plflush ();
()
let plot3 () =
(* For the final graph we wish to override the default tick intervals, and
so do not use PLENV *)
pladv 0;
(* Use standard viewport, and define X range from 0 to 360 degrees, Y range
from -1.2 to 1.2. *)
plvsta ();
plwind 0.0 360.0 (-1.2) 1.2;
(* Draw a box with ticks spaced 60 degrees apart in X, and 0.2 in Y. *)
plcol0 1;
plbox "bcnst" 60.0 2 "bcnstv" 0.2 2;
(* Superimpose a dashed line grid, with 1.5 mm marks and spaces. *)
plstyl mark1 space1;
plcol0 2;
plbox "g" 30.0 0 "g" 0.2 0;
plstyl mark0 space0;
plcol0 3;
pllab "Angle (degrees)" "sine" "#frPLplot Example 1 - Sine function";
let x = Array.init 101 (fun i -> 3.6 *. float_of_int i) in
let y = Array.map (fun xi -> sin (xi *. pi /. 180.0)) x in
plcol0 4;
plline x y;
plflush ();
()
let plot4 () =
let dtr d = float_of_int d *. pi /. 180.0 in
let x0 = Array.init 361 (fun i -> cos (dtr i)) in
let y0 = Array.init 361 (fun i -> sin (dtr i)) in
(* Set up viewport and window, but do not draw box *)
plenv (-1.3) 1.3 (-1.3) 1.3 1 (-2);
for i = 1 to 10 do
let x = Array.map (fun xj -> 0.1 *. float_of_int i *. xj) x0 in
let y = Array.map (fun yj -> 0.1 *. float_of_int i *. yj) y0 in
(* Draw circles for polar grid *)
plline x y;
done;
plcol0 2;
for i = 0 to 11 do
let theta = 30 * i in
let dx = cos (dtr theta) in
let dy = sin (dtr theta) in
(* Draw radial spokes for polar grid *)
pljoin 0.0 0.0 dx dy;
let text = sprintf "%d" theta in
(* Write labels for angle *)
(* Slightly off zero to avoid floating point logic flips at 90 and 270 deg. *)
if dx >= -0.00001 then
plptex dx dy dx dy (-0.15) text
else
plptex dx dy (-.dx) (-.dy) 1.15 text;
done;
(* Draw the graph *)
let rs = Array.init 361 (fun i -> sin (dtr (5 * i))) in
let x = Array.mapi (fun i xi -> xi *. rs.(i)) x0 in
let y = Array.mapi (fun i yi -> yi *. rs.(i)) y0 in
plcol0 3;
plline x y;
plcol0 4;
plmtex "t" 2.0 0.5 0.5 "#frPLplot Example 3 - r(#gh)=sin 5#gh";
plflush ();
()
(* Demonstration of contour plotting *)
let xpts = 35
let ypts = 46
let xspa = 2.0 /. float_of_int (xpts - 1)
let yspa = 2.0 /. float_of_int (ypts - 1)
let tr = [|xspa; 0.0; -1.0; 0.0; yspa; -1.0|]
let mypltr x y =
tr.(0) *. x +. tr.(1) *. y +. tr.(2),
tr.(3) *. x +. tr.(4) *. y +. tr.(5)
let clevel = [|-1.0; -0.8; -0.6; -0.4; -0.2; 0.0; 0.2; 0.4; 0.6; 0.8; 1.0|]
let plot5 () =
let mark = [|1500|] in
let space = [|1500|] in
(* Set up function arrays *)
let z = Array.make_matrix xpts ypts 0.0 in
let w = Array.make_matrix xpts ypts 0.0 in
for i = 0 to xpts - 1 do
let xx = float_of_int (i - (xpts / 2)) /. float_of_int (xpts / 2) in
for j = 0 to ypts - 1 do
let yy =
float_of_int (j - (ypts / 2)) /. float_of_int (ypts / 2) -. 1.0
in
z.(i).(j) <- xx *. xx -. yy *. yy;
w.(i).(j) <- 2.0 *. xx *. yy;
done
done;
plenv (-1.0) 1.0 (-1.0) 1.0 0 0;
plcol0 2;
plset_pltr mypltr;
plcont z 1 xpts 1 ypts clevel;
plstyl mark space;
plcol0 3;
plcont w 1 xpts 1 ypts clevel;
plcol0 1;
pllab "X Coordinate" "Y Coordinate" "Streamlines of flow";
plflush ();
()
(*--------------------------------------------------------------------------*\
* Plots several simple functions from other example programs.
*
* This version sends the output of the first 4 plots (one page) to two
* independent streams.
\*--------------------------------------------------------------------------*)
let () =
let geometry_master = "500x410+100+200" in
let geometry_slave = "500x410+650+200" in
(* plplot initialization *)
(* Parse and process command line arguments *)
plparseopts Sys.argv [PL_PARSE_FULL];
(* If valid geometry specified on command line, use it for both streams. *)
let xp0, yp0, xleng0, yleng0, xoff0, yoff0 = plgpage () in
let valid_geometry = ( xleng0 > 0 && yleng0 > 0 ) in
(* Set up first stream *)
if valid_geometry then
plspage xp0 yp0 xleng0 yleng0 xoff0 yoff0
else
plsetopt "geometry" geometry_master;
plssub 2 2;
plinit ();
let driver = plgdev () in
let fam, num, bmax = plgfam () in
printf "Demo of multiple output streams via the %s driver.\n" driver;
printf "Running with the second stream as slave to the first.\n";
printf "\n";
(* Start next stream *)
plsstrm 1;
if valid_geometry then
plspage xp0 yp0 xleng0 yleng0 xoff0 yoff0
else
plsetopt "geometry" geometry_slave;
(* Turn off pause to make this a slave (must follow master) *)
plspause false;
plsdev driver;
plsfam fam num bmax;
plsetopt "fflen" "2";
plinit ();
(* Set up the data & plot *)
(* Original case *)
plsstrm 0;
let xscale = 6.0 in
let yscale = 1.0 in
let xoff = 0.0 in
let yoff = 0.0 in
plot1 xscale yscale xoff yoff;
(* Set up the data & plot *)
let xscale = 1.0 in
let yscale = 1.0e+6 in
plot1 xscale yscale xoff yoff;
(* Set up the data & plot *)
let xscale = 1.0 in
let yscale = 1.e-6 in
let digmax = 2 in
plsyax digmax 0;
plot1 xscale yscale xoff yoff;
(* Set up the data & plot *)
let xscale = 1.0 in
let yscale = 0.0014 in
let yoff = 0.0185 in
let digmax = 5 in
plsyax digmax 0;
plot1 xscale yscale xoff yoff;
(* To slave *)
(* The pleop() ensures the eop indicator gets lit. *)
plsstrm 1;
plot4 ();
pleop ();
(* Back to master *)
plsstrm 0;
plot2 ();
plot3 ();
(* To slave *)
plsstrm 1;
plot5 ();
pleop ();
(* Back to master to wait for user to advance *)
plsstrm 0;
pleop ();
(* Call plend to finish off. *)
plend ();
()
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