[Feat] add stdev and variance aggregators

Make use of D3 deviation and variance functions to add
stdev and variance options to the list of available
data aggregators.

This fails `yarn test-node`, however master also
fails with the same error.

src/constants/default-settings.js

@@ -346,7 +346,9 @@ export const AGGREGATION_TYPES = {
  maximum: 'maximum',
  minimum: 'minimum',
  median: 'median',
+ stdev: 'stdev',
  sum: 'sum',
+ variance: 'variance',
  // ordinal
  mode: 'mode',
  countUnique: 'count unique'
@@ -364,15 +366,19 @@ export const linearFieldAggrScaleFunctions = {
  [AGGREGATION_TYPES.maximum]: [SCALE_TYPES.quantize, SCALE_TYPES.quantile],
  [AGGREGATION_TYPES.minimum]: [SCALE_TYPES.quantize, SCALE_TYPES.quantile],
  [AGGREGATION_TYPES.median]: [SCALE_TYPES.quantize, SCALE_TYPES.quantile],
- [AGGREGATION_TYPES.sum]: [SCALE_TYPES.quantize, SCALE_TYPES.quantile]
+ [AGGREGATION_TYPES.stdev]: [SCALE_TYPES.quantize, SCALE_TYPES.quantile],
+ [AGGREGATION_TYPES.sum]: [SCALE_TYPES.quantize, SCALE_TYPES.quantile],
+ [AGGREGATION_TYPES.variance]: [SCALE_TYPES.quantize, SCALE_TYPES.quantile]
  },
 
  [CHANNEL_SCALES.sizeAggr]: {
  [AGGREGATION_TYPES.average]: [SCALE_TYPES.linear, SCALE_TYPES.sqrt, SCALE_TYPES.log],
  [AGGREGATION_TYPES.maximum]: [SCALE_TYPES.linear, SCALE_TYPES.sqrt, SCALE_TYPES.log],
  [AGGREGATION_TYPES.minimum]: [SCALE_TYPES.linear, SCALE_TYPES.sqrt, SCALE_TYPES.log],
  [AGGREGATION_TYPES.median]: [SCALE_TYPES.linear, SCALE_TYPES.sqrt, SCALE_TYPES.log],
- [AGGREGATION_TYPES.sum]: [SCALE_TYPES.linear, SCALE_TYPES.sqrt, SCALE_TYPES.log]
+ [AGGREGATION_TYPES.stdev]: [SCALE_TYPES.linear, SCALE_TYPES.sqrt, SCALE_TYPES.log],
+ [AGGREGATION_TYPES.sum]: [SCALE_TYPES.linear, SCALE_TYPES.sqrt, SCALE_TYPES.log],
+ [AGGREGATION_TYPES.variance]: [SCALE_TYPES.linear, SCALE_TYPES.sqrt, SCALE_TYPES.log]
  }
 };
 

src/utils/aggregate-utils.js

@@ -18,7 +18,7 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
-import {min, max, mean, median, sum} from 'd3-array';
+import {deviation, min, max, mean, median, sum, variance} from 'd3-array';
 import {AGGREGATION_TYPES} from 'constants/default-settings';
 
 const getFrenquency = data => data.reduce((uniques, val) => {
@@ -53,8 +53,12 @@ export function aggregate(data, technique) {
  return min(data);
  case AGGREGATION_TYPES.median:
  return median(data);
+ case AGGREGATION_TYPES.stdev:
+ return deviation(data);
  case AGGREGATION_TYPES.sum:
  return sum(data);
+ case AGGREGATION_TYPES.variance:
+ return variance(data);
  default:
  return data.length;
  }

test/fixtures/state-saved-v1-6.js

@@ -1,3 +1,23 @@
+// Copyright (c) 2019 Uber Technologies, Inc.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
 export const savedStateWIthNonValidFilters = {
  datasets: [
  {