(value, mean, stdev)
| 119294 | return mean + x * stdev; |
| 119295 | } |
| 119296 | function densityNormal(value, mean, stdev) { |
| 119297 | stdev = stdev == null ? 1 : stdev; |
| 119298 | const z = (value - (mean || 0)) / stdev; |
| 119299 | return Math.exp(-0.5 * z * z) / (stdev * SQRT2PI); |
| 119300 | } // Approximation from West (2009) |
| 119301 | // Better Approximations to Cumulative Normal Functions |
| 119302 | function cumulativeNormal(value, mean, stdev) { |
| 119303 | mean = mean || 0; |