universe/src/reductioAggregators.js

The fastest way to query and explore multivariate datasets

'use strict'

// var _ = require('./lodash') // _ is defined but never used

module.exports = {
  shorthandLabels: {
    $count: 'count',
    $sum: 'sum',
    $avg: 'avg',
    $min: 'min',
    $max: 'max',
    $med: 'med',
    $sumSq: 'sumSq',
    $std: 'std',
  },
  aggregators: {
    $count: $count,
    $sum: $sum,
    $avg: $avg,
    $min: $min,
    $max: $max,
    $med: $med,
    $sumSq: $sumSq,
    $std: $std,
    $valueList: $valueList,
    $dataList: $dataList,
  },
}

// Aggregators

function $count(reducer/* , value */) {
  return reducer.count(true)
}

function $sum(reducer, value) {
  return reducer.sum(value)
}

function $avg(reducer, value) {
  return reducer.avg(value)
}

function $min(reducer, value) {
  return reducer.min(value)
}

function $max(reducer, value) {
  return reducer.max(value)
}

function $med(reducer, value) {
  return reducer.median(value)
}

function $sumSq(reducer, value) {
  return reducer.sumOfSq(value)
}

function $std(reducer, value) {
  return reducer.std(value)
}

function $valueList(reducer, value) {
  return reducer.valueList(value)
}

function $dataList(reducer/* , value */) {
  return reducer.dataList(true)
}

// TODO histograms
// TODO exceptions