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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 | 127x 1x 1x 1x 1x 1x 1x 44x 3x 41x 41x 26x 26x 26x 133x 26x 1x 1x 866x 866x 1x 12x 6x 1x 45x 9x 9x 9x 1x 202x 14x 1x 13x 2x 11x 11x 11x 11x 1x 195x 13x 1x 12x 2x 10x 10x 9x 1x 42x 6x 6x 1x 5x 1x 140x 10x 10x 5x 1x 16x 4x 4x 4x 4x 4x 4x 4x 19x 4x 8x 8x 1x 100x 100x 19x 19x 19x 19x 19x 19x 19x 95x 19x 19x 19x 19x 1x 81x 9x 1x 8x 2x 6x 1x 25x 5x 1x 4x 1x 3x 3x 1x 12x 12x 3x 9x 7x 19x 9x 1x 25x 25x 1x 25x 25x 1x 25x 25x 1x 4x 4x 1x 4x 4x | E{ Expression } = require './expression' { typeIsArray , allTrue, anyTrue, removeNulls, numerical_sort} = require '../util/util' { build } = require './builder' { Exception } = require '../datatypes/exception' { greaterThan, lessThan } = require '../util/comparison' Quantity = require './quantity' quantitiesOrArg = (arr) -> arr = removeNulls(arr) # short curcuit empty arrays and return if arr.length == 0 return arr allQs = arr.every (x) -> x.isQuantity someQs = arr.some (x) -> x.isQuantity if allQs unit = arr[0].unit values = [] for i in arr values.push i.convertUnits(unit) return values else if someQs throw new Exception("Cannot perform aggregate operations on mixed values of Quantities and non Quantities") else arr quantityOrValue = (value, arr) -> # we used the first unit in the list to convert to so that is what # we will use as a unit for quantities if arr?[0]?.unit Quantity.createQuantity(value, arr[0].unit) else value class AggregateExpression extends Expression constructor:(json) -> super @source = build json.source module.exports.Count = class Count extends AggregateExpression constructor:(json) -> super exec: (ctx) -> arg = @source.execute(ctx) if typeIsArray(arg) removeNulls(arg).length module.exports.Sum = class Sum extends AggregateExpression constructor:(json) -> super exec: (ctx) -> arg = @source.execute(ctx) if typeIsArray(arg) filtered = quantitiesOrArg(arg) val = if filtered.length == 0 then null else filtered.reduce (x,y) -> x+y quantityOrValue(val, arg) module.exports.Min = class Min extends AggregateExpression constructor:(json) -> super exec: (ctx) -> list = @source.execute(ctx) return null unless list? listWithoutNulls = removeNulls(list) return null unless listWithoutNulls.length > 0 # We assume the list is an array of all the same type. minimum = listWithoutNulls[0] for element in listWithoutNulls minimum = element if lessThan(element, minimum) return minimum module.exports.Max = class Max extends AggregateExpression constructor:(json) -> super exec: (ctx) -> list = @source.execute(ctx) return null unless list? listWithoutNulls = removeNulls(list) return null unless listWithoutNulls.length > 0 # We assume the list is an array of all the same type. maximum = listWithoutNulls[0] for element in listWithoutNulls maximum = element if greaterThan(element, maximum) maximum module.exports.Avg = class Avg extends AggregateExpression constructor:(json) -> super exec: (ctx) -> arg = @source.execute(ctx) if typeIsArray(arg) filtered = quantitiesOrArg(arg) return null if filtered.length == 0 sum = filtered.reduce (x,y) -> x+y quantityOrValue((sum / filtered.length),arg) module.exports.Median = class Median extends AggregateExpression constructor:(json) -> super exec: (ctx) -> arg = @source.execute(ctx) if typeIsArray(arg) filtered = numerical_sort(quantitiesOrArg(arg),"asc") if filtered.length == 0 null else if (filtered.length % 2 == 1) quantityOrValue(filtered[(filtered.length - 1) / 2],arg) else v = (filtered[(filtered.length / 2) - 1] + filtered[(filtered.length / 2)]) / 2 quantityOrValue(v,arg) module.exports.Mode = class Mode extends AggregateExpression constructor:(json) -> super exec: (ctx) -> arg = @source.execute(ctx) if typeIsArray(arg) filtered = removeNulls(arg) mode = @mode(filtered) if mode.length == 1 then mode[0] else mode mode: (arr) -> max = 0 counts = {} results = [] for elem in arr cnt = counts[elem] = (counts[elem] ? 0) + 1 if cnt is max and elem not in results results.push elem else if cnt > max results = [elem] max = cnt results module.exports.StdDev = class StdDev extends AggregateExpression constructor:(json) -> super @type = "standard_deviation" exec: (ctx) -> args = @source.execute(ctx) if typeIsArray(args) val = quantitiesOrArg(args) if val.length > 0 then quantityOrValue(@calculate(val),args) else null calculate: (list) -> val = @stats(list) if val then val[@type] stats:(list) -> sum = list.reduce (x,y) -> x+y mean = sum / list.length sumOfSquares = 0 for sq in list sumOfSquares += Math.pow((sq - mean),2) std_var = (1/list.length) * sumOfSquares pop_var = (1/(list.length-1)) * sumOfSquares std_dev = Math.sqrt std_var pop_dev = Math.sqrt pop_var {standard_variance: std_var, population_variance: pop_var, standard_deviation: std_dev, population_deviation: pop_dev} module.exports.Product = class Product extends AggregateExpression constructor:(json) -> super exec: (ctx) -> listOfValues = @source.execute(ctx) return null if listOfValues is null [product, filtered] = productValue(listOfValues) return null if product is null return quantityOrValue(product, listOfValues) module.exports.GeometricMean = class GeometricMean extends AggregateExpression constructor:(json) -> super exec: (ctx) -> listOfValues = @source.execute(ctx) return null if listOfValues is null [product, filtered] = productValue(listOfValues) return null if product is null geoMean = Math.pow(product, 1.0 / filtered.length) return geoMean productValue = (list) -> product = 1 if typeIsArray(list) filtered = removeNulls(list) return [null, null] if filtered.length == 0 for item in filtered if item.isQuantity product = Quantity.doMultiplication(product,item) else product = product * item return [product, filtered] else [null, null] module.exports.PopulationStdDev = class PopulationStdDev extends StdDev constructor:(json) -> super @type = "population_deviation" module.exports.Variance = class Variance extends StdDev constructor:(json) -> super @type = "standard_variance" module.exports.PopulationVariance = class PopulationVariance extends StdDev constructor:(json) -> super @type = "population_variance" module.exports.AllTrue = class AllTrue extends AggregateExpression constructor:(json) -> super exec: (ctx) -> args =@source.execute(ctx) allTrue(args) module.exports.AnyTrue = class AnyTrue extends AggregateExpression constructor:(json) -> super exec: (ctx) -> args = @source.execute(ctx) anyTrue(args) |