Renames DistributionData[sumSquaredDeviations] to [sumOfSquaredDeviation] (#209)

Author: isaikevych

packages/opencensus-core/src/stats/recorder.ts

@@ -70,11 +70,11 @@ export class Recorder {
     const oldMean = distributionData.mean;
     distributionData.mean = distributionData.mean +
         (value - distributionData.mean) / distributionData.count;
-    distributionData.sumSquaredDeviations =
-        distributionData.sumSquaredDeviations +
+    distributionData.sumOfSquaredDeviation =
+        distributionData.sumOfSquaredDeviation +
         (value - oldMean) * (value - distributionData.mean);
     distributionData.stdDeviation = Math.sqrt(
-        distributionData.sumSquaredDeviations / distributionData.count);
+        distributionData.sumOfSquaredDeviation / distributionData.count);
 
     return distributionData;
   }

packages/opencensus-core/src/stats/types.ts

@@ -189,7 +189,7 @@ export interface DistributionData extends AggregationMetadata {
    * Get the computed sum of squared deviations of all recorded values in the
    * histogram.
    */
-  sumSquaredDeviations: number;
+  sumOfSquaredDeviation: number;
   /** Bucket distribution of the histogram */
   buckets: Bucket[];
   /** Buckets count */

packages/opencensus-core/src/stats/view.ts

@@ -170,7 +170,7 @@ export class BaseView implements View {
           min: Number.MAX_SAFE_INTEGER,
           mean: null as number,
           stdDeviation: null as number,
-          sumSquaredDeviations: null as number,
+          sumOfSquaredDeviation: null as number,
           buckets,
           bucketCounts
         };

packages/opencensus-core/test/test-recorder.ts

@@ -47,7 +47,7 @@ function assertDistributionData(
       values.map(value => Math.pow(value - expectedMean, 2))
           .reduce((acc, curr) => acc + curr);
   assert.ok(isAlmostEqual(
-      distributionData.sumSquaredDeviations, expectedSumSquaredDeviations,
+      distributionData.sumOfSquaredDeviation, expectedSumSquaredDeviations,
       EPSILON));
 
   const expectedStdDeviation =
@@ -161,7 +161,7 @@ describe('Recorder', () => {
                    min: Number.MAX_SAFE_INTEGER,
                    mean: 0,
                    stdDeviation: 0,
-                   sumSquaredDeviations: 0,
+                   sumOfSquaredDeviation: 0,
                    buckets: [2, 4, 6],
                    bucketCounts: [0, 0, 0, 0]
                  };

packages/opencensus-core/test/test-view.ts

@@ -48,7 +48,7 @@ function assertDistributionData(
       values.map(value => Math.pow(value - expectedMean, 2))
           .reduce((acc, curr) => acc + curr);
   assert.ok(isAlmostEqual(
-      distributionData.sumSquaredDeviations, expectedSumSquaredDeviations,
+      distributionData.sumOfSquaredDeviation, expectedSumSquaredDeviations,
       EPSILON));
 
   const expectedStdDeviation =

packages/opencensus-exporter-stackdriver/src/stackdriver-monitoring.ts

@@ -211,7 +211,7 @@ export class StackdriverStatsExporter implements StatsEventListener {
     return {
       count: distribution.count,
       mean: distribution.mean,
-      sumOfSquaredDeviation: distribution.sumSquaredDeviations,
+      sumOfSquaredDeviation: distribution.sumOfSquaredDeviation,
       bucketOptions: {explicitBuckets: {bounds: [0, ...distribution.buckets]}},
       bucketCounts: [0, ...distribution.bucketCounts]
     };

packages/opencensus-exporter-zpages/templates/statsz-view-distribution.ejs

@@ -23,7 +23,7 @@
                     <td class="borderRL"><?= data.snapshot.count ?></td>
                     <td class="borderRL"><?= data.snapshot.max ?></td>
                     <td class="borderRL"><?= data.snapshot.min ?></td>
-                    <td class="borderRL"><?= data.snapshot.sumSquaredDeviations ?></td>
+                    <td class="borderRL"><?= data.snapshot.sumOfSquaredDeviation ?></td>
                     <td class="borderRL">
                         <table>
                             <thead>

packages/opencensus-exporter-zpages/test/test-zpages.ts

@@ -409,7 +409,7 @@ describe('Zpages Exporter', () => {
         assert.equal(snapshot.max, 22);
         assert.equal(snapshot.min, 11);
         assert.equal(snapshot.mean, 16.5);
-        assert.equal(snapshot.sumSquaredDeviations, 60.5);
+        assert.equal(snapshot.sumOfSquaredDeviation, 60.5);
       });
     });
   });