/usr/share/doc/libplplot11/examples/ocaml/x11.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 | (* $Id: x11.ml 11680 2011-03-27 17:57:51Z airwin $
Mesh plot demo.
Copyright (C) 2004 Rafael Laboissiere
Copyright 2008 Hezekiah M. Carty (OCaml adaptation)
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 Plplot
let xpts = 35 (* Data points in x *)
let ypts = 46 (* Data points in y *)
let levels = 10
let opt = [|PL_DRAW_LINEXY; PL_DRAW_LINEXY|]
let alt = [|33.0; 17.0|]
let az = [|24.0; 115.0|]
let title = [|
"#frPLplot Example 11 - Alt=33, Az=24, Opt=3";
"#frPLplot Example 11 - Alt=17, Az=115, Opt=3"
|]
let cmap1_init () =
let i = [|0.0; 1.0|] in (* Left and right bounds *)
let h = [|240.0; 0.0|] in(* blue -> green -> yellow -> red *)
let l = [|0.6; 0.6|] in
let s = [|0.8; 0.8|] in
plscmap1n 256;
plscmap1l false i h l s None;
()
(*--------------------------------------------------------------------------*\
* Does a series of mesh plots for a given data set, with different
* viewing options in each plot.
\*--------------------------------------------------------------------------*)
let () =
(* Parse and process command line arguments *)
plparseopts Sys.argv [PL_PARSE_FULL];
(* Initialize plplot *)
plinit ();
let nlevel = levels in
let x =
Array.init xpts (
fun i ->
3.0 *. float_of_int (i - xpts / 2) /. float_of_int (xpts / 2)
)
in
let y =
Array.init ypts (
fun i ->
3.0 *. float_of_int (i - ypts / 2) /. float_of_int (ypts / 2)
)
in
let z = Array.make_matrix xpts ypts 0.0 in
for i = 0 to xpts - 1 do
let xx = x.(i) in
for j = 0 to ypts - 1 do
let yy = y.(j) in
z.(i).(j) <-
3.0 *. (1.0 -. xx) *. (1.0 -. xx) *.
exp (~-.(xx *. xx) -. (yy +. 1.0) *. (yy +. 1.0)) -.
10.0 *. (xx /. 5.0 -. xx**3.0 -. yy**5.0) *.
exp (~-.xx *. xx -. yy *. yy) -.
1.0 /. 3.0 *. exp (~-.(xx +. 1.0) *. (xx +. 1.0) -. (yy *. yy));
done
done;
let zmax, zmin = plMinMax2dGrid z in
let step = (zmax -. zmin) /. float_of_int (nlevel + 1) in
let clevel =
Array.init nlevel (fun i -> zmin +. step +. step *. float_of_int i)
in
cmap1_init ();
for k = 0 to 1 do
for i = 0 to 3 do
pladv 0;
plcol0 1;
plvpor 0.0 1.0 0.0 0.9;
plwind (-1.0) 1.0 (-1.0) 1.5;
plw3d 1.0 1.0 1.2 (-3.0) 3.0 (-3.0) 3.0 zmin zmax alt.(k) az.(k);
plbox3 "bnstu" "x axis" 0.0 0
"bnstu" "y axis" 0.0 0
"bcdmnstuv" "z axis" 0.0 4;
plcol0 2;
(* wireframe plot *)
let () =
match i with
0 ->
plmesh x y z [opt.(k)]
| 1 ->
(* magnitude colored wireframe plot *)
plmesh x y z [opt.(k); PL_MAG_COLOR]
| 2 ->
(* magnitude colored wireframe plot with sides *)
plot3d x y z [opt.(k); PL_MAG_COLOR] true
| 3 ->
(* magnitude colored wireframe plot with base contour *)
plmeshc x y z [opt.(k); PL_MAG_COLOR; PL_BASE_CONT] clevel
| _ -> raise (Failure "You let i get too big!")
in
plcol0 3;
plmtex "t" 1.0 0.5 0.5 title.(k);
done
done;
(* Clean up *)
plend ();
()
|