/usr/share/doc/libplplot12/examples/ada/x01a.adb is in libplplot-ada1-dev 5.10.0+dfsg2-0.1ubuntu2.
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-- Simple line plot and multiple windows demo.
-- Copyright (C) 2007 - 2011 Jerry Bauck
-- 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
with
Ada.Text_IO,
Ada.Numerics,
Ada.Numerics.Long_Elementary_Functions,
PLplot_Auxiliary,
PLplot_Traditional;
use
Ada.Text_IO,
Ada.Numerics,
Ada.Numerics.Long_Elementary_Functions,
PLplot_Auxiliary,
PLplot_Traditional;
procedure x01a is
xs, ys : Real_Vector (0 .. 5);
xscale, yscale, xoff, yoff : Long_Float;
fontset : Integer := 1;
notes : String := "Make sure you get it right!";
procedure plot1 is
xmin, xmax, ymin, ymax : Long_Float;
x, y : Real_Vector (0 .. 59);
begin
for i in x'Range loop
x(i) := xoff + xscale * Long_Float(i + 1) / Long_Float(x'Length);
y(i) := yoff + yscale * x(i)**2.0;
end loop;
xmin := x(x'First);
xmax := x(x'Last);
ymin := y(y'First);
ymax := y(y'Last);
for i in xs'Range loop
xs(i) := x(i * 10 + 3);
ys(i) := y(i * 10 + 3);
end loop;
-- 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(2);
pllab("(x)", "(y)", "#frPLplot Example 1 - y=x#u2");
-- Plot the data points
plcol0(4);
plpoin(xs, ys, 9);
-- Draw the line through the data
plcol0(3);
plline(x, y);
end plot1;
procedure plot2 is
x, y : Real_Vector (0 .. 99);
begin
-- 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
for i in x'Range loop
x(i) := (Long_Float(i) - 19.0) / 6.0;
y(i) := 1.0;
if x(i) /= 0.0 then
y(i) := sin(x(i)) / x(i);
end if;
end loop;
-- Draw the line
plcol0(3);
plwidth(2.0);
plline(x, y);
plwidth(1.0);
end plot2;
procedure plot3 is
x, y : Real_Vector (0 .. 100);
space1, mark1 : Integer_Array_1D(1 .. 1) := (others => 1500);
begin
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 expects a pointer! (-- Not Ada.)
plstyl(mark1, space1);
plcol0(2);
plbox("g", 30.0, 0, "g", 0.2, 0);
plstyl(Default_Continuous_Line);
plcol0(3);
pllab("Angle (degrees)", "sine", "#frPLplot Example 1 - Sine function");
for i in x'Range loop
x(i) := 3.6 * Long_Float(i);
y(i) := sin(x(i) * pi / 180.0);
end loop;
plcol0(4);
plline(x, y);
end plot3;
begin
-- Parse and process command line arguments
plparseopts(PL_PARSE_FULL);
-- Get version number, just for kicks
Put_Line("PLplot library version: " & plgver);
-- Initialize plplot
-- Divide page into 2x2 plots unless user overrides
plstar(2, 2);
-- Set up the data
-- Original case
xscale := 6.0;
yscale := 1.0;
xoff := 0.0;
yoff := 0.0;
-- Do a plot
plot1;
-- Set up the data
xscale := 1.0;
yscale := 0.0014;
yoff := 0.0185;
-- Do a plot
plsyax(5, 0);
plot1;
plot2;
plot3;
-- Don't forget to call PLEND to finish off!
plend;
end x01a;
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