add the magic <meta> tag for IE8+9

[dygraphs.git] / tests / linear-regression.html
diff --git a/tests/linear-regression.html b/tests/linear-regression.html

index 22017d3..95177e3 100644 (file)
--- a/tests/linear-regression.html
+++ b/tests/linear-regression.html
@@ -1,8 +1,10 @@
+<!DOCTYPE html>
  <html>
    <head>
+    <meta http-equiv="X-UA-Compatible" content="IE=EmulateIE7; IE=EmulateIE9">
      <title>Linear Regression</title>
      <!--[if IE]>
-    <script type="text/javascript" src="excanvas.js"></script>
+    <script type="text/javascript" src="../excanvas.js"></script>
      <![endif]-->
      <script type="text/javascript" src="../strftime/strftime-min.js"></script>
      <script type="text/javascript" src="../rgbcolor/rgbcolor.js"></script>
@@ -35,7 +37,8 @@
                {
                  labels: ['X', 'Y1', 'Y2'],
                  underlayCallback: drawLines,
-                drawPoints: true
+                drawPoints: true,
+                strokeWidth: 0.0
                }
            );
  
@@ -54,6 +57,10 @@
  
            var y = g.getValue(i, series);
            if (y == null) continue;
+          if (y.length == 2) {
+            // using fractions
+            y = y[0] / y[1];
+          }
  
            num++;
            sum_x += x;
@@ -66,7 +73,9 @@
          var b = (sum_y - a * sum_x) / num;
  
          coeffs[series] = [b, a];
-        console.log("coeffs(" + series + "): [" + b + ", " + a + "]");
+        if (typeof(console) != 'undefined') {
+          console.log("coeffs(" + series + "): [" + b + ", " + a + "]");
+        }
  
          g.updateOptions({});  // forces a redraw.
        }
@@ -93,8 +102,11 @@
            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;