Normal_probability_plot¶

class
reliability.Probability_plotting.
Normal_probability_plot
¶ Normal probability plot
Generates a probability plot on Normal scaled probability paper so that the distribution appears linear. Inputs: failures  the array or list of failure times right_censored  the array or list of right censored failure times show_fitted_distribution  True/False. If True, the fitted distribution will be plotted on the probability plot. Defaults to True show_scatter_points  True/False. If True, the plot will include the scatter points from the failure times. Defaults to True. a  the heuristic constant for plotting positions of the form (ka)/(n+12a). Default is a=0.3 which is the median rank method (same as the default in Minitab).
For more heuristics, see: https://en.wikipedia.org/wiki/Q%E2%80%93Q_plot#HeuristicsCI  the confidence interval for the bounds. Default is 0.95 for 95% CI. CI_type  time, reliability, None. Default is time. This is the type of CI bounds. i.e. bounds on time or bounds on reliability. Use None to turn off the confidence intervals. kwargs are accepted for the fitted line (eg. linestyle, label, color)
Outputs: The plot is the only output. Use plt.show() to show it.