Index: /trunk/Ohana/src/opihi/cmd.data/fit2d.c
===================================================================
--- /trunk/Ohana/src/opihi/cmd.data/fit2d.c	(revision 39019)
+++ /trunk/Ohana/src/opihi/cmd.data/fit2d.c	(revision 39020)
@@ -217,10 +217,10 @@
       Y = X = 1;
       for (i = ny = 0; ny < nterm; ny++) {
-	Y = X;
+	X = Y;
 	for (nx = 0; nx < nterm - ny; nx++, i++) {
-	  *zf += b[i][0]*Y;
-	  Y = Y * (*y);
-	}
-	X = X * (*x);
+	  *zf += b[i][0]*X;
+	  X = X * (*x);
+	}
+	Y = Y * (*y);
       }
     }