如何使箭头更薄matplotlib

Question

I plot an arrow as below, whilst I think it's a little bit big. How can I make it thinner and smaller? Thank you

for i in range(len(x)):
    plt.annotate(df.index[i],xy=(x[i],y[i]),xytext=(x[i]+1.31,y[i]-0.55),arrowprops=dict(facecolor='blue', shrink=0.1))

Answer 1

You should try adjusting the width parameter (from the docs )

plt.annotate(df.index[i], 
    xy=(x[i],y[i]), xytext=(x[i]+1.31,y[i]-0.55),
    arrowprops=dict(facecolor='blue', shrink=0.1, width=2)
)

I've adjusted your snippet to make the parameter more obvious. Note also that width is in points, so you may need to try a few different values out. Other values worth looking at are frac . headwidth and shrink ( also in the docs ), especially if you want to make the head smaller too!