matplotlib: draw a box on axes

Question

import matplotlib.patches as patches

df2 = pd.melt(
    data2.query('worktype_id!=38')[['period','worktype', 'utilization_billable', 'utilization' ]], 
    id_vars=['period', 'worktype']).sort_values(['period', 'variable'], ascending=[True, True])
g = sns.relplot(x='period', y='value', 
            hue='variable', data=df2, col='worktype', kind='line', col_wrap=4, 
            )
for ax in g.axes:
    ax.axhline(y=75, color='g', linestyle='--')
    ax.axhline(y=90, color='r', linestyle='--')
    rect = plt.Rectangle((10,10),10,10,linewidth=3,edgecolor='r',facecolor='red', alpha=1)
    ax.add_patch(rect)

I want to draw the box between y=75 and 90 (green and red lines on the chart), but nothing is shown up when I do ax.add_patch

this is the image I get:

So How do I fill out the area between red and green horizontal lines?

Possible duplicate of [Matplotlib fill between multiple lines](https://stackoverflow.com/questions/16417496/matplotlib-fill-between-multiple-lines) — ALollz, Mar 20 '19 at 21:11

score 2 · Accepted Answer · answered Mar 20 '19 at 21:12

2

If you have a fixed area you want to fill and you want to do it across the entire chart, you are probably better off using axvspan. E.g.

ax.axvspan(75, 90, facecolor='red')

answered Mar 20 '19 at 21:12

John Sloper

1,813
12
14

score 1 · Answer 2 · answered Mar 20 '19 at 21:17

plt.fill_between(plt.xlim(),[75,75],[90,90])

plt.xlim() : Returns start and end of xaxis
At starting of x axis start filling the color starting from 75 and ending at 90 of y axis
Continue filling till the end of x axis again starting from 75 ending at 90 of y axis

You will not need to plot a Rectangle

matplotlib: draw a box on axes

2 Answers2