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Description: Add seed for random number generators
This patch add seeds for the random number generators used when
building the PDF figures of the manual. This ensures that the data
appearing in the figures is reproducible.
Author: Rafael Laboissière <rafael@debian.org>
Forwarded: https://savannah.gnu.org/bugs/index.php?48655
Applied-Upstream: https://sourceforge.net/p/octave/communications/ci/a04be1255b3cd5be117d5dbb704fe944b350f1b2/
Last-Update: 2025-02-01
--- octave-communications-1.2.1.orig/doc/commsimages.m
+++ octave-communications-1.2.1/doc/commsimages.m
@@ -48,10 +48,12 @@ function commsimages (nm, typ)
d_typ = ["-d", typ];
endif
+ seed = 1234;
+
if (strcmp (nm, "awgn"))
x = 0:0.1:2*pi;
y = sin (x);
- noisy = awgn (y, 10, "measured");
+ noisy = awgn (y, 10, "measured", [], seed);
plot (x, y, "r");
hold on;
plot (x, noisy, "g--");
@@ -62,9 +64,9 @@ function commsimages (nm, typ)
ovsp = 50;
x = 1:n;
xi = 1:1/ovsp:n-0.1;
- y = randsrc (1, n, [1 + 1i, 1 - 1i, -1 - 1i, -1 + 1i]);
+ y = randsrc (1, n, [1 + 1i, 1 - 1i, -1 - 1i, -1 + 1i], seed);
yi = interp1 (x, y, xi);
- noisy = awgn (yi, 15, "measured");
+ noisy = awgn (yi, 15, "measured", [], seed);
cf = gcf ();
set (cf, "tag", "eyediagram");
eyediagram (noisy, ovsp, [], [], [], cf);
@@ -74,9 +76,9 @@ function commsimages (nm, typ)
ovsp = 5;
x = 1:n;
xi = 1:1/ovsp:n-0.1;
- y = randsrc (1, n, [1 + 1i, 1 - 1i, -1 - 1i, -1 + 1i]);
+ y = randsrc (1, n, [1 + 1i, 1 - 1i, -1 - 1i, -1 + 1i], seed);
yi = interp1 (x, y, xi);
- noisy = awgn (yi, 15, "measured");
+ noisy = awgn (yi, 15, "measured", [], seed);
cf = gcf ();
set (cf, "tag", "scatterplot");
f = scatterplot (noisy, 1, 0, "b", cf);
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