| 201 | return average |
| 202 | } |
| 203 | correlation(array1, array2) { |
| 204 | if (array1.length != array2.length) { |
| 205 | throw "[TheoremJS]: Correlation error, arrays are not the same size" |
| 206 | } |
| 207 | const average1 = this.average(...array1).toNumber() |
| 208 | const average2 = this.average(...array2).toNumber() |
| 209 | let up = 0; |
| 210 | let down1 = 0; |
| 211 | let down2 = 0; |
| 212 | for (var i = 0; i < array1.length; i++) { |
| 213 | up += (array1[i] - average1)*(array2[i] - average2) |
| 214 | down1 += Math.pow(array1[i] - average1, 2) |
| 215 | down2 += Math.pow(array2[i] - average2, 2) |
| 216 | } |
| 217 | const result = up / Math.sqrt(down1 * down2) |
| 218 | return new BigNumber(Math.round(result * 10 ** 10) / 10 ** 10) |
| 219 | } |
| 220 | median() { |
| 221 | let array = [...arguments] |
| 222 | if (typeof array[0] == 'object') { |