Index: /trunk/Ohana/src/opihi/cmd.data/stats.c
===================================================================
--- /trunk/Ohana/src/opihi/cmd.data/stats.c	(revision 11289)
+++ /trunk/Ohana/src/opihi/cmd.data/stats.c	(revision 11290)
@@ -29,5 +29,5 @@
   }
 
-  if ((argc != 2) | (argc != 6)) {
+  if ((argc != 2) && (argc != 6)) {
     gprint (GP_ERR, "USAGE: stats <buffer> sx sy nx ny\n");
     gprint (GP_ERR, "OR:    stats <buffer>\n");
@@ -37,5 +37,5 @@
   if ((buf = SelectBuffer (argv[1], OLDBUFFER, TRUE)) == NULL) return (FALSE);
 
-  if (argc == 2) {
+  if (argc == 6) {
     sx = strcmp (argv[2], "-") ? atof (argv[2]) : 0;
     sy = strcmp (argv[3], "-") ? atof (argv[3]) : 0;
Index: /trunk/Ohana/src/opihi/cmd.data/test/stats.sh
===================================================================
--- /trunk/Ohana/src/opihi/cmd.data/test/stats.sh	(revision 11290)
+++ /trunk/Ohana/src/opihi/cmd.data/test/stats.sh	(revision 11290)
@@ -0,0 +1,156 @@
+
+$skip = 0
+
+list tests
+ test1
+ test2
+ test3
+end
+
+# test using full range
+macro test1
+ $PASS = 1
+ break -auto off
+
+ gaussdev dev {100*100} 0.0 1.0
+ dimenup dev buf 100 100
+ stats -q buf 
+ $npix = 100*100
+
+ if ($STATUS == 0)
+   echo "failed command"
+   $PASS = 0
+ end
+ if ($NPIX != $npix) 
+   echo "failed npix"
+   $PASS = 0
+ end
+ if (abs($MEAN - 0.0) > (2.0/sqrt($npix))) 
+   echo "failed mean"
+   $PASS = 0
+ end
+ if (abs($MEDIAN - 0.0) > (2.0/sqrt($npix))) 
+   echo "failed median"
+   $PASS = 0
+ end
+ if (abs($SIGMA - 1.0) > (2.0/sqrt($npix))) 
+   echo "failed sigma"
+   $PASS = 0
+ end
+ if ($MIN < -4.0) 
+   echo "failed min"
+   $PASS = 0
+ end
+ if ($MAX > +4.0)
+   echo "failed max"
+   $PASS = 0
+ end
+# I don't this MODE is being correctly calculated.
+ if ($skip && (abs($MODE - 0.0) > (2.0/sqrt($npix))))
+   echo "MODE fails: known problem with mode"
+   $PASS = 0
+ end
+ if (abs($TOTAL - $MEAN*$npix) > (2.0/sqrt($npix))) 
+   echo "failed total"
+   $PASS = 0
+ end
+end
+
+# test using full range
+macro test2
+ $PASS = 1
+ break -auto off
+
+ gaussdev dev {100*100} 0.0 1.0
+ dimenup dev buf 100 100
+ stats -q buf  - - - -
+ $npix = 100*100
+
+ if ($STATUS == 0)
+   echo "failed command"
+   $PASS = 0
+ end
+ if ($NPIX != $npix) 
+   echo "failed npix"
+   $PASS = 0
+ end
+ if (abs($MEAN - 0.0) > (2.0/sqrt($npix))) 
+   echo "failed mean"
+   $PASS = 0
+ end
+ if (abs($MEDIAN - 0.0) > (2.0/sqrt($npix))) 
+   echo "failed median"
+   $PASS = 0
+ end
+ if (abs($SIGMA - 1.0) > (2.0/sqrt($npix))) 
+   echo "failed sigma"
+   $PASS = 0
+ end
+ if ($MIN < -4.0) 
+   echo "failed min"
+   $PASS = 0
+ end
+ if ($MAX > +4.0)
+   echo "failed max"
+   $PASS = 0
+ end
+# I don't this MODE is being correctly calculated.
+ if ($skip && (abs($MODE - 0.0) > (2.0/sqrt($npix))))
+   echo "MODE fails: known problem with mode"
+   $PASS = 0
+ end
+ if (abs($TOTAL - $MEAN*$npix) > (2.0/sqrt($npix))) 
+   echo $TOTAL {$MEAN*$npix} {abs($TOTAL - $MEAN*$npix) > (2.0/sqrt($npix))) 
+   echo "failed total"
+   $PASS = 0
+ end
+end
+
+# test using full range
+macro test3
+ $PASS = 1
+ break -auto off
+
+ gaussdev dev {100*100} 0.0 1.0
+ dimenup dev buf 100 100
+ stats -q buf 10 10 10 10
+ $npix = 10*10
+
+ if ($STATUS == 0)
+   echo "failed command"
+   $PASS = 0
+ end
+ if ($NPIX != $npix) 
+   echo "failed npix"
+   $PASS = 0
+ end
+ if (abs($MEAN - 0.0) > (2.0/sqrt($npix))) 
+   echo "failed mean"
+   $PASS = 0
+ end
+ if (abs($MEDIAN - 0.0) > (2.0/sqrt($npix))) 
+   echo "failed median"
+   $PASS = 0
+ end
+ if (abs($SIGMA - 1.0) > (2.0/sqrt($npix))) 
+   echo "failed sigma"
+   $PASS = 0
+ end
+ if ($MIN < -4.0) 
+   echo "failed min"
+   $PASS = 0
+ end
+ if ($MAX > +4.0)
+   echo "failed max"
+   $PASS = 0
+ end
+# I don't this MODE is being correctly calculated.
+ if ($skip && (abs($MODE - 0.0) > (2.0/sqrt($npix))))
+   echo "MODE fails: known problem with mode"
+   $PASS = 0
+ end
+ if (abs($TOTAL - $MEAN*$npix) > (2.0/sqrt($npix))) 
+   echo "failed total"
+   $PASS = 0
+ end
+end