two different versions; tweak color logic

[dygraphs.git] / tests / linear-regression.html

diff --git a/tests/linear-regression.html b/tests/linear-regression.html
index 22017d3..bed74e0 100644 (file)
--- a/tests/linear-regression.html
+++ b/tests/linear-regression.html
@@ -66,7 +66,9 @@
         var b = (sum_y - a * sum_x) / num;
 
         coeffs[series] = [b, a];
-        console.log("coeffs(" + series + "): [" + b + ", " + a + "]");
+        if (console) {
+          console.log("coeffs(" + series + "): [" + b + ", " + a + "]");
+        }
 
         g.updateOptions({});  // forces a redraw.
       }
@@ -93,8 +95,11 @@
           var p1 = g.toDomCoords(x1, y1);
           var p2 = g.toDomCoords(x2, y2);
 
-          console.log("(" + x1 + ", " + y1 + ") - (" + x2 + ", " + y2 + ")");
-          var color = g.getColors()[i - 1];
+          var c = new RGBColor(g.getColors()[i - 1]);
+          c.r = Math.floor(255 - 0.5 * (255 - c.r));
+          c.g = Math.floor(255 - 0.5 * (255 - c.g));
+          c.b = Math.floor(255 - 0.5 * (255 - c.b));
+          var color = c.toHex();
           ctx.save();
           ctx.strokeStyle = color;
           ctx.lineWidth = 1.0;