Matlab style error plotting for matplotlib pyplot

matlab_style_errorbars.py

import matplotlib.pyplot as plt
import numpy as np

# matlab style errorbars
def errorbars(x, y, err, erralpha=0.2, color=None, label=None, ax=plt):
    line = ax.plot(x, y, color=color, label=label)
    col = line[0].get_color()
    plt.fill_between(x, y-err, y+err, alpha=erralpha, color=col, zorder=-1)

# example
if __name__ == '__main__':
    data = np.random.random((10, 9))

    data_avg = np.mean(data, axis=1)
    data_err = np.std(data, axis=1)

    # x data is required, as it is with plt.errorbar
    errorbars(range(data.shape[0]), data_avg, data_err)
    plt.show()