Implement Composition.buildFromEvents()

tracing/tracing/value/numeric.html

Index: tracing/tracing/value/numeric.html
diff --git a/tracing/tracing/value/numeric.html b/tracing/tracing/value/numeric.html
index 4af5c55bed328c409d6765a6bdcf19df79a44830..af04aa8e7c4e15fab28a151a9e51e3a3c38f7944 100644
--- a/tracing/tracing/value/numeric.html
+++ b/tracing/tracing/value/numeric.html
@@ -641,6 +641,11 @@ tr.exportTo('tr.v', function() {
   /**
    * Create a linearly scaled tr.v.NumericBuilder with |numBins| bins ranging
    * from |range.min| to |range.max|.
+   *
+   * @param {!tr.v.Unit} unit
+   * @param {!tr.b.Range} range
+   * @param {number} numBins
+   * @return {NumericBuilder}
    */
   NumericBuilder.createLinear = function(unit, range, numBins) {
     if (range.isEmpty)
@@ -649,6 +654,22 @@ tr.exportTo('tr.v', function() {
         range.max, numBins);
   };
 
+  /**
+   * Create an exponentially scaled tr.v.NumericBuilder with |numBins| bins
+   * ranging from |range.min| to |range.max|.
+   *
+   * @param {!tr.v.Unit} unit
+   * @param {!tr.b.Range} range
+   * @param {number} numBins
+   * @return {NumericBuilder}
+   */
+  NumericBuilder.createExponential = function(unit, range, numBins) {
+    if (range.isEmpty)
+      throw new Error('Range must be non-empty');
+    return new NumericBuilder(unit, range.min).addExponentialBins(
+        range.max, numBins);
+  };
+
   function ScalarNumeric(unit, value) {
     if (!(typeof(value) == 'number'))
       throw new Error('Expected value to be number');