plotting_positions
plotting_positions(n, method='weibull', alpha=None)Empirical plotting positions for a sample of size n.
Computes (i - alpha) / (n + 1 - 2 * alpha) for i = 1..n.
Parameters
| Name | Type | Description | Default |
|---|---|---|---|
| n | int | Sample size. | required |
| method | ('weibull', 'median', 'blom', 'cunnane', 'gringorten', 'hazen') | Named plotting-position formula (alpha of 0, 0.3175, 0.375, 0.4, 0.44, 0.5 respectively). Ignored when alpha is given. |
"weibull" |
| alpha | float | Explicit plotting-position parameter in [0, 0.5]. |
None |
Returns
| Name | Type | Description |
|---|---|---|
| numpy.ndarray | n non-exceedance probabilities for the ordered sample. |