# HG changeset patch
# User Ben Abbott  <bpabbott@mac.com>
# Date 1324520388 18000
# Node ID 22c50cbad2ce92381056b9d99b4115da93da761a
# Parent  c3ea07298af4f8c61bf6326ac3502d2616cec5f3
Add clf() to all plot demos.

* axis.m, compass.m, contour3.m, contourf.m, cylinder.m, ellipsoid.m,
  errorbar.m, ezcontour.m, ezcontourf.m, ezmesh.m, ezmeshc.m, ezplot.m,
  ezplot3.m, ezpolar.m, ezsurf.m, ezsurfc.m, feather.m, fplot.m,
  loglogerr.m, pcolor.m, pie.m, pie3.m, plot3.m, plotmatrix.m,
  quiver.m, quiver3.m, refreshdata.m, ribbon.m, rose.m, scatter3.m,
  semilogx.m, semilogxerr.m, semilogy.m, semilogyerr.m, shading.m,
  sombrero.m, stairs.m, stem.m, stem3.m, surf.m, surfc.m, surfl.m,
  surfnorm.m, trimesh.m, triplot.m, trisurf.m, uimenu.m:
  Add clf() to the beginning of each demo to ensure pre-existing graphics
  objects don't interfere with the demo.

diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/axis.m
--- a/scripts/plot/axis.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/axis.m	Wed Dec 21 21:19:48 2011 -0500
@@ -506,6 +506,7 @@
 %! axis tight
 
 %!demo
+%! clf
 %! x = -10:0.1:10;
 %! y = sin(x)./(1+abs(x)) + x*0.1 - .4;
 %! plot (x, y)
@@ -515,6 +516,7 @@
 %! box off
 
 %!demo
+%! clf
 %! x = -10:0.1:10;
 %! y = sin(x)./(1+abs(x)) + x*0.1 - .4;
 %! plot (x, y)
@@ -524,6 +526,7 @@
 %! box off
 
 %!demo
+%! clf
 %! x = -10:0.1:10;
 %! y = sin(x)./(1+abs(x)) + x*0.1 - .4;
 %! plot (x, y)
@@ -533,6 +536,7 @@
 %! box off
 
 %!demo
+%! clf
 %! x = -10:0.1:10;
 %! y = sin(x)./(1+abs(x)) + x*0.1 - .4;
 %! plot (x, y)
@@ -542,6 +546,7 @@
 %! box off
 
 %!demo
+%! clf
 %! x = -10:0.1:10;
 %! y = sin(x)./(1+abs(x)) + x*0.1 - .4;
 %! plot (x, y)
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/compass.m
--- a/scripts/plot/compass.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/compass.m	Wed Dec 21 21:19:48 2011 -0500
@@ -112,6 +112,7 @@
 
 
 %!demo
+%! clf
 %! randn_9x1_data = [-2.555884; 0.394974; -0.191871; -1.147024; 1.355425; -0.437335; -0.014370; -0.941312; 1.240300];
 %! randn_1x9_data = [1.42934, -1.10821, -1.70404, 0.63357, -0.68337, -1.19771, -0.96502, -1.12810, 0.22457];
 %! a = toeplitz ([1;randn_9x1_data], [1,randn_1x9_data]);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/contour3.m
--- a/scripts/plot/contour3.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/contour3.m	Wed Dec 21 21:19:48 2011 -0500
@@ -75,6 +75,7 @@
 endfunction
 
 %!demo
+%! clf
 %! contour3 (peaks (19));
 %! hold on
 %! surface (peaks (19), "facecolor", "none", "edgecolor", "black")
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/contourf.m
--- a/scripts/plot/contourf.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/contourf.m	Wed Dec 21 21:19:48 2011 -0500
@@ -81,10 +81,12 @@
 endfunction
 
 %!demo
+%! clf
 %! [x, y, z] = peaks (50);
 %! contourf (x, y, z, -7:9)
 
 %!demo
+%! clf
 %! [theta, r] = meshgrid (linspace (0, 2*pi, 64), linspace(0,1,64));
 %! [X, Y] = pol2cart (theta, r);
 %! Z = sin(2*theta).*(1-r);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/cylinder.m
--- a/scripts/plot/cylinder.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/cylinder.m	Wed Dec 21 21:19:48 2011 -0500
@@ -86,6 +86,7 @@
 endfunction
 
 %!demo
+%! clf
 %! [x, y, z] = cylinder (10:-1:0,50);
 %! surf (x, y, z);
 %! title ("a cone")
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/ellipsoid.m
--- a/scripts/plot/ellipsoid.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/ellipsoid.m	Wed Dec 21 21:19:48 2011 -0500
@@ -70,4 +70,5 @@
 endfunction
 
 %!demo
+%! clf
 %! ellipsoid (0, 0, 1, 2, 3, 4, 20);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/errorbar.m
--- a/scripts/plot/errorbar.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/errorbar.m	Wed Dec 21 21:19:48 2011 -0500
@@ -138,16 +138,19 @@
 
 
 %!demo
+%! clf
 %! rand_1x11_data1 = [0.82712, 0.50325, 0.35613, 0.77089, 0.20474, 0.69160, 0.30858, 0.88225, 0.35187, 0.14168, 0.54270];
 %! rand_1x11_data2 = [0.506375, 0.330106, 0.017982, 0.859270, 0.140641, 0.327839, 0.275886, 0.162453, 0.807592, 0.318509, 0.921112];
 %! errorbar (0:10, rand_1x11_data1, 0.25*rand_1x11_data2);
 
 %!demo
+%! clf
 %! rand_1x11_data3 = [0.423650, 0.142331, 0.213195, 0.129301, 0.975891, 0.012872, 0.635327, 0.338829, 0.764997, 0.401798, 0.551850];
 %! rand_1x11_data4 = [0.682566, 0.456342, 0.132390, 0.341292, 0.108633, 0.601553, 0.040455, 0.146665, 0.309187, 0.586291, 0.540149];
 %! errorbar(0:10, rand_1x11_data3, rand_1x11_data4, ">");
 
 %!demo
+%! clf
 %! x = 0:0.5:2*pi;
 %! err = x/100;
 %! y1 = sin (x);
@@ -155,6 +158,7 @@
 %! hg = errorbar (x, y1, err, "~", x, y2, err, ">");
 
 %!demo
+%! clf
 %! x = 0:0.5:2*pi;
 %! err = x/100;
 %! y1 = sin (x);
@@ -162,6 +166,7 @@
 %! hg = errorbar (x, y1, err, err, "#r", x, y2, err, err, "#~");
 
 %!demo
+%! clf
 %! x = 0:0.5:2*pi;
 %! err = x/100;
 %! y1 = sin (x);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/ezcontour.m
--- a/scripts/plot/ezcontour.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/ezcontour.m	Wed Dec 21 21:19:48 2011 -0500
@@ -62,6 +62,7 @@
 
 
 %!demo
+%! clf
 %! f = @(x,y) sqrt(abs(x .* y)) ./ (1 + x.^2 + y.^2);
 %! ezcontour (f, [-3, 3]);
 
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/ezcontourf.m
--- a/scripts/plot/ezcontourf.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/ezcontourf.m	Wed Dec 21 21:19:48 2011 -0500
@@ -62,5 +62,6 @@
 
 
 %!demo
+%! clf
 %! f = @(x,y) sqrt(abs(x .* y)) ./ (1 + x.^2 + y.^2);
 %! ezcontourf (f, [-3, 3]);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/ezmesh.m
--- a/scripts/plot/ezmesh.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/ezmesh.m	Wed Dec 21 21:19:48 2011 -0500
@@ -83,10 +83,12 @@
 
 
 %!demo
+%! clf
 %! f = @(x,y) sqrt(abs(x .* y)) ./ (1 + x.^2 + y.^2);
 %! ezmesh (f, [-3, 3]);
 
 %!demo
+%! clf
 %! fx = @(s,t) cos (s) .* cos(t);
 %! fy = @(s,t) sin (s) .* cos(t);
 %! fz = @(s,t) sin (t);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/ezmeshc.m
--- a/scripts/plot/ezmeshc.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/ezmeshc.m	Wed Dec 21 21:19:48 2011 -0500
@@ -73,6 +73,7 @@
 
 
 %!demo
+%! clf
 %! f = @(x,y) sqrt(abs(x .* y)) ./ (1 + x.^2 + y.^2);
 %! ezmeshc (f, [-3, 3]);
 
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/ezplot.m
--- a/scripts/plot/ezplot.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/ezplot.m	Wed Dec 21 21:19:48 2011 -0500
@@ -81,11 +81,14 @@
 
 
 %!demo
+%! clf
 %! ezplot (@cos, @sin)
 
 %!demo
+%! clf
 %! ezplot ("1/x")
 
 %!demo
+%! clf
 %! ezplot (inline ("x^2 - y^2 = 1"))
 
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/ezplot3.m
--- a/scripts/plot/ezplot3.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/ezplot3.m	Wed Dec 21 21:19:48 2011 -0500
@@ -61,6 +61,7 @@
 
 
 %!demo
+%! clf
 %! fx = @(t) cos (t);
 %! fy = @(t) sin (t);
 %! fz = @(t) t;
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/ezpolar.m
--- a/scripts/plot/ezpolar.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/ezpolar.m	Wed Dec 21 21:19:48 2011 -0500
@@ -56,5 +56,6 @@
 
 
 %!demo
+%! clf
 %! ezpolar (@(t) 1 + sin (t));
 
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/ezsurf.m
--- a/scripts/plot/ezsurf.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/ezsurf.m	Wed Dec 21 21:19:48 2011 -0500
@@ -83,10 +83,12 @@
 
 
 %!demo
+%! clf
 %! f = @(x,y) sqrt(abs(x .* y)) ./ (1 + x.^2 + y.^2);
 %! ezsurf (f, [-3, 3]);
 
 %!demo
+%! clf
 %! fx = @(s,t) cos (s) .* cos(t);
 %! fy = @(s,t) sin (s) .* cos(t);
 %! fz = @(s,t) sin (t);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/ezsurfc.m
--- a/scripts/plot/ezsurfc.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/ezsurfc.m	Wed Dec 21 21:19:48 2011 -0500
@@ -73,6 +73,7 @@
 
 
 %!demo
+%! clf
 %! f = @(x,y) sqrt(abs(x .* y)) ./ (1 + x.^2 + y.^2);
 %! ezsurfc (f, [-3, 3]);
 
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/feather.m
--- a/scripts/plot/feather.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/feather.m	Wed Dec 21 21:19:48 2011 -0500
@@ -111,6 +111,7 @@
 
 
 %!demo
+%! clf
 %! phi = [0 : 15 : 360] * pi / 180;
 %! feather (sin (phi), cos (phi))
 
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/fplot.m
--- a/scripts/plot/fplot.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/fplot.m	Wed Dec 21 21:19:48 2011 -0500
@@ -128,7 +128,9 @@
 endfunction
 
 %!demo
+%! clf
 %! fplot ("cos", [0, 2*pi])
 
 %!demo
+%! clf
 %! fplot ("[cos(x), sin(x)]", [0, 2*pi])
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/loglogerr.m
--- a/scripts/plot/loglogerr.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/loglogerr.m	Wed Dec 21 21:19:48 2011 -0500
@@ -61,6 +61,7 @@
 endfunction
 
 %!demo
+%! clf
 %! x = exp (log(0.01):0.2:log(10));
 %! y = wblpdf (x, 3, 2);
 %! eyu = 2*rand (size (y)) .* y;
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/pcolor.m
--- a/scripts/plot/pcolor.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/pcolor.m	Wed Dec 21 21:19:48 2011 -0500
@@ -87,6 +87,7 @@
 %! pcolor(Z);
 
 %!demo
+%! clf
 %! [X,Y,Z]=sombrero;
 %! [Fx,Fy] = gradient(Z);
 %! pcolor(X,Y,Fx+Fy);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/pie.m
--- a/scripts/plot/pie.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/pie.m	Wed Dec 21 21:19:48 2011 -0500
@@ -68,15 +68,18 @@
 
 
 %!demo
+%! clf
 %! pie ([3, 2, 1], [0, 0, 1]);
 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
 
 %!demo
+%! clf
 %! pie ([3, 2, 1], [0, 0, 1], {"Cheddar", "Swiss", "Camembert"});
 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
 %! axis ([-2,2,-2,2]);
 
 %!demo
+%! clf
 %! pie ([0.17, 0.34, 0.41], {"Cheddar", "Swiss", "Camembert"});
 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
 %! axis ([-2,2,-2,2]);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/pie3.m
--- a/scripts/plot/pie3.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/pie3.m	Wed Dec 21 21:19:48 2011 -0500
@@ -69,15 +69,18 @@
 
 
 %!demo
+%! clf
 %! pie3 ([5:-1:1], [0, 0, 1, 0, 0]);
 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
 
 %!demo
+%! clf
 %! pie3 ([3, 2, 1], [0, 0, 1], {"Cheddar", "Swiss", "Camembert"});
 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
 %! axis ([-2,2,-2,2]);
 
 %!demo
+%! clf
 %! pie3 ([0.17, 0.34, 0.41], {"Cheddar", "Swiss", "Camembert"});
 %! colormap ([1,0,0;0,1,0;0,0,1;1,1,0;1,0,1;0,1,1]);
 %! axis ([-2,2,-2,2]);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/plot3.m
--- a/scripts/plot/plot3.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/plot3.m	Wed Dec 21 21:19:48 2011 -0500
@@ -333,6 +333,7 @@
 endfunction
 
 %!demo
+%! clf
 %! z = [0:0.05:5];
 %! plot3 (cos(2*pi*z), sin(2*pi*z), z, ";helix;");
 %! plot3 (z, exp(2i*pi*z), ";complex sinusoid;");
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/plotmatrix.m
--- a/scripts/plot/plotmatrix.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/plotmatrix.m	Wed Dec 21 21:19:48 2011 -0500
@@ -96,6 +96,7 @@
 endfunction
 
 %!demo
+%! clf
 %! plotmatrix (randn (100, 3), 'g+')
 
 function plotmatrixdelete (h, d, ax)
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/quiver.m
--- a/scripts/plot/quiver.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/quiver.m	Wed Dec 21 21:19:48 2011 -0500
@@ -89,6 +89,7 @@
 %! set (h, "maxheadsize", 0.33);
 
 %!demo
+%! clf
 %! axis ("equal");
 %! x = linspace (0,3,80);
 %! y = sin (2*pi*x);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/quiver3.m
--- a/scripts/plot/quiver3.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/quiver3.m	Wed Dec 21 21:19:48 2011 -0500
@@ -106,5 +106,13 @@
 %! hold off;
 
 %!demo
+%! clf
+%! [x, y, z] = peaks (25);
+%! surf (x, y, z);
+%! hold on;
+%! [u, v, w] = surfnorm (x, y, z / 10);
+%! h = quiver3 (x, y, z, u, v, w);
+%! set (h, "maxheadsize", 0.33);
+%! hold off;
 %! shading interp
 
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/refreshdata.m
--- a/scripts/plot/refreshdata.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/refreshdata.m	Wed Dec 21 21:19:48 2011 -0500
@@ -106,6 +106,7 @@
 endfunction
 
 %!demo
+%! clf
 %! x = 0:0.1:10;
 %! y = sin (x);
 %! plot (x, y, "ydatasource", "y");
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/ribbon.m
--- a/scripts/plot/ribbon.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/ribbon.m	Wed Dec 21 21:19:48 2011 -0500
@@ -88,6 +88,7 @@
 
 
 %!demo
+%! clf
 %! [x, y, z] = sombrero ();
 %! [x, y] = meshgrid (x, y);
 %! ribbon (y, z);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/rose.m
--- a/scripts/plot/rose.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/rose.m	Wed Dec 21 21:19:48 2011 -0500
@@ -106,5 +106,6 @@
 
 
 %!demo
+%! clf
 %! rose ([2*randn(1e5, 1), pi + 2*randn(1e5, 1)]);
 
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/scatter3.m
--- a/scripts/plot/scatter3.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/scatter3.m	Wed Dec 21 21:19:48 2011 -0500
@@ -84,22 +84,26 @@
 
 
 %!demo
+%! clf
 %! [x, y, z] = peaks (20);
 %! scatter3 (x(:), y(:), z(:), [], z(:));
 
 %!demo
+%! clf
 %! x = rand (20,1);
 %! y = rand (20,1);
 %! z = rand (20,1);
 %! scatter3 (x(:), y(:), z(:), 10, z(:), "s");
 
 %!demo
+%! clf
 %! x = rand (20,1);
 %! y = rand (20,1);
 %! z = rand (20,1);
 %! scatter3 (x(:), y(:), z(:), 20*z(:), z(:), "s");
 
 %!demo
+%! clf
 %! x = rand (20,1);
 %! y = rand (20,1);
 %! z = rand (20,1);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/semilogx.m
--- a/scripts/plot/semilogx.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/semilogx.m	Wed Dec 21 21:19:48 2011 -0500
@@ -64,6 +64,7 @@
 
 
 %!demo
+%! clf ();
 %! x = 1:0.01:10;
 %! y = (x .* (1 + rand (size (x)))) .^ 2;
 %! semilogx (y, x);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/semilogxerr.m
--- a/scripts/plot/semilogxerr.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/semilogxerr.m	Wed Dec 21 21:19:48 2011 -0500
@@ -61,6 +61,7 @@
 endfunction
 
 %!demo
+%! clf
 %! x = exp (log(0.01):0.2:log(10));
 %! y = wblpdf (x, 2, 2);
 %! ey = 0.5*rand (size (y)) .* y;
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/semilogy.m
--- a/scripts/plot/semilogy.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/semilogy.m	Wed Dec 21 21:19:48 2011 -0500
@@ -64,6 +64,7 @@
 endfunction
 
 %!demo
+%! clf ();
 %! x = 1:0.01:10;
 %! y = (x .* (1 + rand (size (x)))) .^ 2;
 %! semilogy (x, y);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/semilogyerr.m
--- a/scripts/plot/semilogyerr.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/semilogyerr.m	Wed Dec 21 21:19:48 2011 -0500
@@ -61,6 +61,7 @@
 endfunction
 
 %!demo
+%! clf
 %! x = 0.25:0.25:10;
 %! y = wblpdf (x, 4, 2);
 %! eyu = rand (size (y));
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/shading.m
--- a/scripts/plot/shading.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/shading.m	Wed Dec 21 21:19:48 2011 -0500
@@ -82,26 +82,31 @@
 %! title ('shading "faceted"')
 
 %!demo
+%! clf
 %! sombrero
 %! shading flat
 %! title ('shading "flat"')
 
 %!demo
+%! clf
 %! sombrero
 %! shading interp
 %! title ('shading "interp"')
 
 %!demo
+%! clf
 %! pcolor (peaks ())
 %! shading faceted
 %! title ('shading "faceted"')
 
 %!demo
+%! clf
 %! pcolor (peaks ())
 %! shading flat
 %! title ('shading "flat"')
 
 %!demo
+%! clf
 %! pcolor (peaks ())
 %! shading interp
 %! title ('shading "interp"')
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/sombrero.m
--- a/scripts/plot/sombrero.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/sombrero.m	Wed Dec 21 21:19:48 2011 -0500
@@ -62,4 +62,5 @@
 endfunction
 
 %!demo
+%! clf
 %! sombrero ();
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/stairs.m
--- a/scripts/plot/stairs.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/stairs.m	Wed Dec 21 21:19:48 2011 -0500
@@ -210,12 +210,14 @@
 
 
 %!demo
+%! clf
 %! x = 1:10;
 %! rand_1x10_data1 = [0.073, 0.455, 0.837, 0.124, 0.426, 0.781, 0.004, 0.024, 0.519, 0.698];
 %! y = rand_1x10_data1;
 %! stairs (x, y);
 
 %!demo
+%! clf
 %! x = 1:10;
 %! rand_1x10_data2 = [0.014, 0.460, 0.622, 0.394, 0.531, 0.378, 0.466, 0.788, 0.342, 0.893];
 %! y = rand_1x10_data2;
@@ -223,9 +225,11 @@
 %! plot (xs, ys);
 
 %!demo
+%! clf
 %! stairs (1:9);
 
 %!demo
+%! clf
 %! [xs, ys] = stairs (9:-1:1);
 %! plot (xs, ys);
 
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/stem.m
--- a/scripts/plot/stem.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/stem.m	Wed Dec 21 21:19:48 2011 -0500
@@ -88,35 +88,42 @@
 
 
 %!demo
+%! clf
 %! x = 1:10;
 %! stem (x);
 
 %!demo
+%! clf
 %! x = 1:10;
 %! y = 2*x;
 %! stem (x, y);
 
 %!demo
+%! clf
 %! x = 1:10;
 %! y = 2*x;
 %! h = stem (x, y, "r");
 
 %!demo
+%! clf
 %! x = 1:10;
 %! y = 2*x;
 %! h = stem (x, y, "-.k");
 
 %!demo
+%! clf
 %! x = 1:10;
 %! y = 2*x;
 %! h = stem (x, y, "-.k.");
 
 %!demo
+%! clf
 %! x = 1:10;
 %! y = 2*x;
 %! h = stem (x, y, "filled");
 
 %!demo
+%! clf
 %! x = [0 : 10]';
 %! y = [sin(x), cos(x)];
 %! h = stem (x, y);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/stem3.m
--- a/scripts/plot/stem3.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/stem3.m	Wed Dec 21 21:19:48 2011 -0500
@@ -53,5 +53,6 @@
 endfunction
 
 %!demo
+%! clf
 %! theta = 0:0.2:6;
 %! stem3 (cos (theta), sin (theta), theta)
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/surf.m
--- a/scripts/plot/surf.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/surf.m	Wed Dec 21 21:19:48 2011 -0500
@@ -71,12 +71,14 @@
 %! surf (Z);
 
 %!demo
+%! clf
 %! [~,~,Z] = sombrero;
 %! [Fx,Fy] = gradient (Z);
 %! surf (Z, Fx+Fy);
 %! shading interp;
 
 %!demo
+%! clf
 %! [X,Y,Z] = sombrero;
 %! [~,Fy] = gradient (Z);
 %! surf (X, Y, Z, Fy);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/surfc.m
--- a/scripts/plot/surfc.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/surfc.m	Wed Dec 21 21:19:48 2011 -0500
@@ -80,12 +80,14 @@
 %! surfc(Z);
 
 %!demo
+%! clf
 %! [~,~,Z]=sombrero;
 %! [Fx,Fy] = gradient(Z);
 %! surfc(Z,Fx+Fy);
 %! shading interp;
 
 %!demo
+%! clf
 %! [X,Y,Z]=sombrero;
 %! [~,Fy] = gradient(Z);
 %! surfc(X,Y,Z,Fy);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/surfl.m
--- a/scripts/plot/surfl.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/surfl.m	Wed Dec 21 21:19:48 2011 -0500
@@ -179,6 +179,7 @@
 %! shading interp;
 
 %!demo
+%! clf
 %! [X,Y,Z]=sombrero;
 %! colormap(copper);
 %! [az, el] = view;
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/surfnorm.m
--- a/scripts/plot/surfnorm.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/surfnorm.m	Wed Dec 21 21:19:48 2011 -0500
@@ -142,13 +142,16 @@
 endfunction
 
 %!demo
+%! clf
 %! colormap (jet (64))
 %! [x, y, z] = peaks(10);
 %! surfnorm (x, y, z);
 
 %!demo
+%! clf
 %! surfnorm (peaks(10));
 
 %!demo
+%! clf
 %! surfnorm (peaks(32));
 %! shading interp
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/trimesh.m
--- a/scripts/plot/trimesh.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/trimesh.m	Wed Dec 21 21:19:48 2011 -0500
@@ -56,6 +56,7 @@
 
 
 %!demo
+%! clf
 %! old_state = rand ("state");
 %! restore_state = onCleanup (@() rand ("state", old_state));
 %! rand ("state", 10);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/triplot.m
--- a/scripts/plot/triplot.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/triplot.m	Wed Dec 21 21:19:48 2011 -0500
@@ -48,6 +48,7 @@
 
 
 %!demo
+%! clf
 %! old_state = rand ("state");
 %! restore_state = onCleanup (@() rand ("state", old_state));
 %! rand ("state", 2);
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/trisurf.m
--- a/scripts/plot/trisurf.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/trisurf.m	Wed Dec 21 21:19:48 2011 -0500
@@ -73,6 +73,7 @@
 
 
 %!demo
+%! clf
 %! old_state = rand ("state");
 %! restore_state = onCleanup (@() rand ("state", old_state));
 %! rand ("state", 10);
@@ -84,6 +85,7 @@
 %! trisurf (tri, x(:), y(:), z(:));
 
 %!demo
+%! clf
 %! x = rand (100, 1);
 %! y = rand (100, 1);
 %! z = x.^2 + y.^2;
@@ -91,6 +93,7 @@
 %! trisurf (tri, x, y, z);
 
 %!demo
+%! clf
 %! x = rand (100, 1);
 %! y = rand (100, 1);
 %! z = x.^2 + y.^2;
@@ -98,6 +101,7 @@
 %! trisurf (tri, x, y, z, "facecolor", "interp");
 
 %!demo
+%! clf
 %! x = rand (100, 1);
 %! y = rand (100, 1);
 %! z = x.^2 + y.^2;
diff -r c3ea07298af4 -r 22c50cbad2ce scripts/plot/uimenu.m
--- a/scripts/plot/uimenu.m	Wed Dec 21 21:01:22 2011 -0500
+++ b/scripts/plot/uimenu.m	Wed Dec 21 21:19:48 2011 -0500
@@ -91,6 +91,7 @@
 
 
 %!demo
+%! clf
 %! surfl (peaks);
 %! colormap (copper);
 %! shading ("interp");