# HG changeset patch
# User Rik <octave@nomad.inbox5.com>
# Date 1337878228 25200
# Node ID 57569a35765c076c62594a682e5a987ec25b3b87
# Parent  a543ed02e6739431bdddd5eff87b3d5406bf94b6
Simplify class handling ('single' vs. 'double') for statistical distribution random functions.

* betarnd.m, cauchy_rnd.m, chi2rnd.m, exprnd.m, frnd.m, gamrnd.m, geornd.m,
lognrnd.m, nbinrnd.m, normrnd.m, poissrnd.m, trnd.m, unidrnd.m, unifrnd.m,
wblrnd.m: Use class argument to random number function rather than explicitly
or implicitly casting output to class single.

diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/betarnd.m
--- a/scripts/statistics/distributions/betarnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/betarnd.m	Thu May 24 09:50:28 2012 -0700
@@ -84,11 +84,8 @@
 
   if (isscalar (a) && isscalar (b))
     if ((a > 0) && (a < Inf) && (b > 0) && (b < Inf))
-      r = randg (a, sz);
-      rnd = r ./ (r + randg (b, sz));
-      if (strcmp (cls, "single"))
-        rnd = single (rnd);
-      endif
+      r = randg (a, sz, cls);
+      rnd = r ./ (r + randg (b, sz, cls));
     else
       rnd = NaN (sz, cls);
     endif
@@ -96,8 +93,8 @@
     rnd = NaN (sz, cls);
 
     k = (a > 0) & (a < Inf) & (b > 0) & (b < Inf);
-    r = randg (a(k));
-    rnd(k) = r ./ (r + randg (b(k)));
+    r = randg (a(k), cls);
+    rnd(k) = r ./ (r + randg (b(k), cls));
   endif
 
 endfunction
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/cauchy_rnd.m
--- a/scripts/statistics/distributions/cauchy_rnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/cauchy_rnd.m	Thu May 24 09:50:28 2012 -0700
@@ -84,7 +84,7 @@
 
   if (isscalar (location) && isscalar (scale))
     if (!isinf (location) && (scale > 0) && (scale < Inf))
-      rnd = location - cot (pi * rand (sz)) * scale;
+      rnd = location - cot (pi * rand (sz, cls)) * scale;
     else
       rnd = NaN (sz, cls);
     endif
@@ -92,7 +92,7 @@
     rnd = NaN (sz, cls);
 
     k = !isinf (location) & (scale > 0) & (scale < Inf);
-    rnd(k) = location(k)(:) - cot (pi * rand (sum (k(:)), 1)) .* scale(k)(:);
+    rnd(k) = location(k)(:) - cot (pi * rand (sum (k(:)), 1, cls)) .* scale(k)(:);
   endif
 
 endfunction
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/chi2rnd.m
--- a/scripts/statistics/distributions/chi2rnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/chi2rnd.m	Thu May 24 09:50:28 2012 -0700
@@ -77,10 +77,7 @@
 
   if (isscalar (n))
     if ((n > 0) && (n < Inf))
-      rnd = 2 * randg (n/2, sz);
-      if (strcmp (cls, "single"))
-        rnd = single (rnd);
-      endif
+      rnd = 2 * randg (n/2, sz, cls);
     else
       rnd = NaN (sz, cls);
     endif
@@ -88,7 +85,7 @@
     rnd = NaN (sz, cls);
 
     k = (n > 0) | (n < Inf);
-    rnd(k) = 2 * randg (n(k)/2);
+    rnd(k) = 2 * randg (n(k)/2, cls);
   endif
 
 endfunction
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/exprnd.m
--- a/scripts/statistics/distributions/exprnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/exprnd.m	Thu May 24 09:50:28 2012 -0700
@@ -77,7 +77,7 @@
 
   if (isscalar (lambda))
     if ((lambda > 0) && (lambda < Inf))
-      rnd = rande (sz) * lambda;
+      rnd = rande (sz, cls) * lambda;
     else
       rnd = NaN (sz, cls);
     endif
@@ -85,7 +85,7 @@
     rnd = NaN (sz, cls);
 
     k = (lambda > 0) & (lambda < Inf);
-    rnd(k) = rande (sum (k(:)), 1) .* lambda(k)(:);
+    rnd(k) = rande (sum (k(:)), 1, cls) .* lambda(k)(:);
   endif
 
 endfunction
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/frnd.m
--- a/scripts/statistics/distributions/frnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/frnd.m	Thu May 24 09:50:28 2012 -0700
@@ -84,7 +84,7 @@
 
   if (isscalar (m) && isscalar (n))
     if ((m > 0) && (m < Inf) && (n > 0) && (n < Inf))
-      rnd = n/m * randg (m/2, sz) ./ randg (n/2, sz);
+      rnd = n/m * randg (m/2, sz, cls) ./ randg (n/2, sz, cls);
     else
       rnd = NaN (sz, cls);
     endif
@@ -92,7 +92,7 @@
     rnd = NaN (sz, cls);
 
     k = (m > 0) & (m < Inf) & (n > 0) & (n < Inf);
-    rnd(k) = n(k) ./ m(k) .* randg (m(k)/2) ./ randg (n(k)/2);
+    rnd(k) = n(k) ./ m(k) .* randg (m(k)/2, cls) ./ randg (n(k)/2, cls);
   endif
 
 endfunction
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/gamrnd.m
--- a/scripts/statistics/distributions/gamrnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/gamrnd.m	Thu May 24 09:50:28 2012 -0700
@@ -84,10 +84,7 @@
 
   if (isscalar (a) && isscalar (b))
     if ((a > 0) && (a < Inf) && (b > 0) && (b < Inf))
-      rnd = b * randg (a, sz);
-      if (strcmp (cls, "single"))
-        rnd = single (rnd);
-      endif
+      rnd = b * randg (a, sz, cls);
     else 
       rnd = NaN (sz, cls);
     endif
@@ -95,7 +92,7 @@
     rnd = NaN (sz, cls);
 
     k = (a > 0) & (a < Inf) & (b > 0) & (b < Inf);
-    rnd(k) = b(k) .* randg (a(k));
+    rnd(k) = b(k) .* randg (a(k), cls);
   endif
 
 endfunction
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/geornd.m
--- a/scripts/statistics/distributions/geornd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/geornd.m	Thu May 24 09:50:28 2012 -0700
@@ -77,7 +77,7 @@
 
   if (isscalar (p))
     if (p > 0 && p < 1);
-      rnd = floor (- rande (sz) ./ log (1 - p));
+      rnd = floor (- rande (sz, cls) ./ log (1 - p));
     elseif (p == 0)
       rnd = Inf (sz, cls);
     elseif (p == 1)
@@ -86,10 +86,10 @@
       rnd = NaN (sz, cls);
     endif
   else
-    rnd = floor (- rande (sz) ./ log (1 - p));
+    rnd = floor (- rande (sz, cls) ./ log (1 - p));
 
     k = !(p >= 0) | !(p <= 1);
-  rnd(k) = NaN;
+    rnd(k) = NaN;
 
     k = (p == 0);
     rnd(k) = Inf;
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/lognrnd.m
--- a/scripts/statistics/distributions/lognrnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/lognrnd.m	Thu May 24 09:50:28 2012 -0700
@@ -84,12 +84,12 @@
 
   if (isscalar (mu) && isscalar (sigma))
     if ((sigma > 0) && (sigma < Inf))
-      rnd = exp (mu + sigma * randn (sz));
+      rnd = exp (mu + sigma * randn (sz, cls));
     else
       rnd = NaN (sz, cls);
     endif
   else
-    rnd = exp (mu + sigma .* randn (sz));
+    rnd = exp (mu + sigma .* randn (sz, cls));
 
     k = (sigma < 0) | (sigma == Inf);
     rnd(k) = NaN;
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/nbinrnd.m
--- a/scripts/statistics/distributions/nbinrnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/nbinrnd.m	Thu May 24 09:50:28 2012 -0700
@@ -84,10 +84,7 @@
 
   if (isscalar (n) && isscalar (p))
     if ((n > 0) && (n < Inf) && (p > 0) && (p <= 1))
-      rnd = randp ((1 - p) ./ p .* randg (n, sz));
-      if (strcmp (cls, "single"))
-        rnd = single (rnd);
-      endif
+      rnd = randp ((1 - p) ./ p .* randg (n, sz, cls), cls);
     elseif ((n > 0) && (n < Inf) && (p == 0))
       rnd = zeros (sz, cls);
     else
@@ -100,7 +97,7 @@
     rnd(k) = 0;
 
     k = (n > 0) & (n < Inf) & (p > 0) & (p <= 1);
-    rnd(k) = randp ((1 - p(k)) ./ p(k) .* randg (n(k)));
+    rnd(k) = randp ((1 - p(k)) ./ p(k) .* randg (n(k), cls));
   endif
 
 endfunction
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/normrnd.m
--- a/scripts/statistics/distributions/normrnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/normrnd.m	Thu May 24 09:50:28 2012 -0700
@@ -84,12 +84,12 @@
 
   if (isscalar (mu) && isscalar (sigma))
     if (!isnan (mu) && !isinf (mu) && (sigma > 0) && (sigma < Inf))
-      rnd =  mu + sigma * randn (sz);
+      rnd =  mu + sigma * randn (sz, cls);
     else
       rnd = NaN (sz, cls);
     endif
   else
-    rnd = mu + sigma .* randn (sz);
+    rnd = mu + sigma .* randn (sz, cls);
     k = isnan (mu) | isinf (mu) | !(sigma > 0) | !(sigma < Inf);
     rnd(k) = NaN;
   endif
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/poissrnd.m
--- a/scripts/statistics/distributions/poissrnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/poissrnd.m	Thu May 24 09:50:28 2012 -0700
@@ -77,10 +77,7 @@
 
   if (isscalar (lambda))
     if (lambda >= 0 && lambda < Inf)
-      rnd = randp (lambda, sz);
-      if (strcmp (cls, "single"))
-        rnd = single (rnd);
-      endif
+      rnd = randp (lambda, sz, cls);
     else
       rnd = NaN (sz, cls);
     endif
@@ -88,7 +85,7 @@
     rnd = NaN (sz, cls);
 
     k = (lambda >= 0) & (lambda < Inf);
-    rnd(k) = randp (lambda(k));
+    rnd(k) = randp (lambda(k), cls);
   endif
 
 endfunction
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/trnd.m
--- a/scripts/statistics/distributions/trnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/trnd.m	Thu May 24 09:50:28 2012 -0700
@@ -77,7 +77,7 @@
 
   if (isscalar (n))
     if ((n > 0) && (n < Inf))
-      rnd = randn (sz) ./ sqrt (2*randg (n/2, sz) / n);
+      rnd = randn (sz, cls) ./ sqrt (2*randg (n/2, sz, cls) / n);
     else
       rnd = NaN (sz, cls);
     endif
@@ -85,7 +85,7 @@
     rnd = NaN (sz, cls);
 
     k = (n > 0) & (n < Inf);
-    rnd(k) = randn (sum (k(:)), 1) ./ sqrt (2*randg (n(k)/2) ./ n(k))(:);
+    rnd(k) = randn (sum (k(:)), 1, cls) ./ sqrt (2*randg (n(k)/2, cls) ./ n(k))(:);
   endif
 
 endfunction
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/unidrnd.m
--- a/scripts/statistics/distributions/unidrnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/unidrnd.m	Thu May 24 09:50:28 2012 -0700
@@ -77,12 +77,12 @@
 
   if (isscalar (n))
     if (n > 0 && n == fix (n))
-      rnd = ceil (rand (sz) * n);
+      rnd = ceil (rand (sz, cls) * n);
     else
       rnd = NaN (sz, cls);
     endif
   else
-    rnd = ceil (rand (sz) .* n);
+    rnd = ceil (rand (sz, cls) .* n);
 
     k = ! (n > 0 & n == fix (n));
     rnd(k) = NaN;
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/unifrnd.m
--- a/scripts/statistics/distributions/unifrnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/unifrnd.m	Thu May 24 09:50:28 2012 -0700
@@ -84,12 +84,12 @@
 
   if (isscalar (a) && isscalar (b))
     if ((-Inf < a) && (a < b) && (b < Inf))
-      rnd =  a + (b - a) * rand (sz);
+      rnd =  a + (b - a) * rand (sz, cls);
     else
       rnd = NaN (sz, cls);
     endif
   else
-    rnd =  a + (b - a) .* rand (sz);
+    rnd =  a + (b - a) .* rand (sz, cls);
 
     k = !(-Inf < a) | !(a < b) | !(b < Inf);
     rnd(k) = NaN;
diff -r a543ed02e673 -r 57569a35765c scripts/statistics/distributions/wblrnd.m
--- a/scripts/statistics/distributions/wblrnd.m	Wed May 23 22:34:37 2012 +0200
+++ b/scripts/statistics/distributions/wblrnd.m	Thu May 24 09:50:28 2012 -0700
@@ -84,12 +84,12 @@
 
   if (isscalar (scale) && isscalar (shape))
     if ((scale > 0) && (scale < Inf) && (shape > 0) && (shape < Inf))
-      rnd = scale * rande (sz) .^ (1/shape);
+      rnd = scale * rande (sz, cls) .^ (1/shape);
     else
       rnd = NaN (sz, cls);
     endif
   else
-    rnd = scale .* rande (sz) .^ (1./shape);
+    rnd = scale .* rande (sz, cls) .^ (1./shape);
 
     k = (scale <= 0) | (scale == Inf) | (shape <= 0) | (shape == Inf);
     rnd(k) = NaN;