# HG changeset patch
# User Carnë Draug <carandraug+dev@gmail.com>
# Date 1337201564 14400
# Node ID 5f1d4def40e1a9471715c6e3dd1a40b120700934
# Parent  b9c02ee24de101692256e89d74c1841c2ee38de0
improve compatibility of colormap functions

* autumn.m, bone.m, cool.m, copper.m, flag.m, gmap40.m, gray.m, hot.m,
hsv.m, jet.m, lines.m, ocean.m, pink.m, prism.m, rainbow.m,
spring.m, summer.m, winter: Always size and return 0x3 when size < 1.
Return same values as Matlab when size == 1.

diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/autumn.m
--- a/scripts/image/autumn.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/autumn.m	Wed May 16 16:52:44 2012 -0400
@@ -51,7 +51,7 @@
     b = zeros (n, 1);
     map = [r, g, b];
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/bone.m
--- a/scripts/image/bone.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/bone.m	Wed May 16 16:52:44 2012 -0400
@@ -44,7 +44,7 @@
   endif
 
   if (n == 1)
-    map = [0, 0, 0];
+    map = [0.125, 0.125, 0.125];
   elseif (n > 1)
     x = linspace (0, 1, n)';
     r = (x < 3/4) .* (7/8 * x) ...
@@ -56,7 +56,7 @@
       + (x >= 3/8) .* (7/8 * x + 1/8);
     map = [r, g, b];
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/cool.m
--- a/scripts/image/cool.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/cool.m	Wed May 16 16:52:44 2012 -0400
@@ -50,7 +50,7 @@
     b = ones (n, 1);
     map = [r, g, b];
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/copper.m
--- a/scripts/image/copper.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/copper.m	Wed May 16 16:52:44 2012 -0400
@@ -53,7 +53,7 @@
     b = 1/2 * x;
     map = [r, g, b];
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/flag.m
--- a/scripts/image/flag.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/flag.m	Wed May 16 16:52:44 2012 -0400
@@ -43,8 +43,14 @@
     print_usage ();
   endif
 
-  C = [1, 0, 0; 1, 1, 1; 0, 0, 1; 0, 0, 0];
-  map = C(rem (0:(n-1), 4) + 1, :);
+  if (n == 1)
+    map = [1, 0, 0];
+  elseif (n > 1)
+    C = [1, 0, 0; 1, 1, 1; 0, 0, 1; 0, 0, 0];
+    map = C(rem (0:(n-1), 4) + 1, :);
+  else
+    map = zeros (0, 3);
+  endif
 
 endfunction
 
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/gmap40.m
--- a/scripts/image/gmap40.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/gmap40.m	Wed May 16 16:52:44 2012 -0400
@@ -43,8 +43,12 @@
     print_usage ();
   endif
 
-  C = [1, 0, 0; 0, 1, 0; 0, 0, 1; 1, 1, 0; 1, 0, 1; 0, 1, 1];
-  map = C(rem (0:(n-1), 6) + 1, :);
+  if (n > 1)
+    C = [1, 0, 0; 0, 1, 0; 0, 0, 1; 1, 1, 0; 1, 0, 1; 0, 1, 1];
+    map = C(rem (0:(n-1), 6) + 1, :);
+  else
+    map = zeros (0, 3);
+  endif
 
 endfunction
 
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/gray.m
--- a/scripts/image/gray.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/gray.m	Wed May 16 16:52:44 2012 -0400
@@ -45,9 +45,14 @@
     print_usage ();
   endif
 
-  gr = [0:(n-1)]' / (n - 1);
-
-  map = [gr, gr, gr];
+  if (n == 1)
+    map = [0, 0, 0];
+  elseif (n > 1)
+    gr = [0:(n-1)]' / (n - 1);
+    map = [gr, gr, gr];
+  else
+    map = zeros (0, 3);
+  endif
 
 endfunction
 
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/hot.m
--- a/scripts/image/hot.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/hot.m	Wed May 16 16:52:44 2012 -0400
@@ -44,7 +44,7 @@
   endif
 
   if (n == 1)
-    map = [0, 0, 0];
+    map = [1, 1, 1];
   elseif (n > 1)
     x = linspace (0, 1, n)';
     r = (x < 2/5) .* (5/2 * x) ...
@@ -54,7 +54,7 @@
     b = (x >= 4/5) .* (5 * x - 4);
     map = [r, g, b];
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/hsv.m
--- a/scripts/image/hsv.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/hsv.m	Wed May 16 16:52:44 2012 -0400
@@ -53,7 +53,7 @@
     hue = linspace (0, 1, n)';
     map = hsv2rgb ([hue, ones(n,1), ones(n,1)]);
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/jet.m
--- a/scripts/image/jet.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/jet.m	Wed May 16 16:52:44 2012 -0400
@@ -44,7 +44,7 @@
   endif
 
   if (n == 1)
-    map = [0, 0, 0.5];
+    map = [0, 1, 1];
   elseif (n > 1)
     x = linspace (0, 1, n)';
     r = (x >= 3/8 & x < 5/8) .* (4 * x - 3/2) ...
@@ -58,7 +58,7 @@
       + (x >= 3/8 & x < 5/8) .* (-4 * x + 5/2);
     map = [r, g, b];
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/lines.m
--- a/scripts/image/lines.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/lines.m	Wed May 16 16:52:44 2012 -0400
@@ -42,9 +42,15 @@
     print_usage ();
   endif
 
-  C = get (gca, "colororder");
-  nr = rows (C);
-  map = C(rem (0:(n-1), nr) + 1, :);
+  if (n == 1)
+    map = [0, 0, 1];
+  elseif (n > 1)
+    C = get (gca, "colororder");
+    nr = rows (C);
+    map = C(rem (0:(n-1), nr) + 1, :);
+  else
+    map = zeros (0, 3);
+  endif
 
 endfunction
 
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/ocean.m
--- a/scripts/image/ocean.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/ocean.m	Wed May 16 16:52:44 2012 -0400
@@ -45,17 +45,23 @@
     print_usage ();
   endif
 
-  cutin = fix (n/3);
+  if (n == 1)
+    map = [0, 0, 0];
+  elseif (n > 1)
+    cutin = fix (n/3);
 
-  dr = (n - 1) / cutin;
-  r = prepad ([0:dr:(n-1)], n)';
+    dr = (n - 1) / cutin;
+    r = prepad ([0:dr:(n-1)], n)';
 
-  dg = (n - 1) / (2 * cutin);
-  g = prepad ([0:dg:(n-1)], n)';
+    dg = (n - 1) / (2 * cutin);
+    g = prepad ([0:dg:(n-1)], n)';
+
+    b = [0:(n-1)]';
 
-  b = [0:(n-1)]';
-
-  map = [r, g, b] / (n - 1);
+    map = [r, g, b] / (n - 1);
+  else
+    map = zeros (0, 3);
+  endif
 
 endfunction
 
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/pink.m
--- a/scripts/image/pink.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/pink.m	Wed May 16 16:52:44 2012 -0400
@@ -44,7 +44,7 @@
   endif
 
   if (n == 1)
-    map = [0, 0, 0];
+    map = sqrt([1/3, 1/3, 1/3]);
   elseif (n > 1)
     x = linspace (0, 1, n)';
     r = (x < 3/8) .* (14/9 * x) ...
@@ -56,7 +56,7 @@
       + (x >= 3/4) .* (2 * x - 1);
     map = sqrt ([r, g, b]);
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/prism.m
--- a/scripts/image/prism.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/prism.m	Wed May 16 16:52:44 2012 -0400
@@ -43,8 +43,14 @@
     print_usage ();
   endif
 
-  C = [1, 0, 0; 1, 1/2, 0; 1, 1, 0; 0, 1, 0; 0, 0, 1; 2/3, 0, 1];
-  map = C(rem (0:(n-1), 6) + 1, :);
+  if (n == 1)
+    map = [1 0 0];
+  elseif (n > 1)
+    C = [1, 0, 0; 1, 1/2, 0; 1, 1, 0; 0, 1, 0; 0, 0, 1; 2/3, 0, 1];
+    map = C(rem (0:(n-1), 6) + 1, :);
+  else
+    map = zeros (0, 3);
+  endif
 
 endfunction
 
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/rainbow.m
--- a/scripts/image/rainbow.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/rainbow.m	Wed May 16 16:52:44 2012 -0400
@@ -63,7 +63,7 @@
 
     map = [r, g, b];
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/spring.m
--- a/scripts/image/spring.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/spring.m	Wed May 16 16:52:44 2012 -0400
@@ -50,7 +50,7 @@
     b = 1 - g;
     map = [r, g, b];
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/summer.m
--- a/scripts/image/summer.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/summer.m	Wed May 16 16:52:44 2012 -0400
@@ -51,7 +51,7 @@
     b = 0.4 * ones (n, 1);
     map = [r, g, b];
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction
diff -r b9c02ee24de1 -r 5f1d4def40e1 scripts/image/winter.m
--- a/scripts/image/winter.m	Wed May 16 16:52:08 2012 -0400
+++ b/scripts/image/winter.m	Wed May 16 16:52:44 2012 -0400
@@ -50,7 +50,7 @@
     b = 1 - g / 2;
     map = [r, g, b];
   else
-    map = [];
+    map = zeros (0, 3);
   endif
 
 endfunction