python - How to change arrow head width and length of CurveB in matplotlib? -


i trying create annotations arrow code given below:

import matplotlib.pyplot plt figure = plt.figure(figsize=(5.15, 5.15)) figure.clf() plot = plt.subplot(111) plot.set_xlabel(r'\textit{x}', labelpad=6) plot.set_ylabel(r'\textit{y}', labelpad=6) plt.annotate(r'\textit{p}', xy = (0.5, 0.5),  \     xycoords = 'data', xytext = (0.4, 0.4), \     textcoords = 'data', fontsize = 7, arrowprops=dict(arrowstyle = "->")) plt.show()

i tried change head width , head length follows:

arrowprops=dict(arrowstyle = "->", head_width = 0.2, head_length = 0.1)

but gives me following error:

attributeerror: 'fancyarrowpatch' object has no attribute 'set_head_width'

how change head length, head width , body width in matplotlib?

use headwidth , frac specify width , length of arrowhead.
frac the headlength written fraction total arrow length. 

plt.annotate(r'\textit{p}', xy = (0.5, 0.5),  \     xycoords = 'data', xytext = (0.4, 0.4), \     textcoords = 'data', fontsize = 7, arrowprops=dict(headwidth = 15, frac = 0.5))

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