使用 Matplotlib 比较图形中的多条线

Question

I create a dataframe with this code:

sg = df[['Month','price','Year']].groupby(['Year','Month']).mean().reset_index().sort_values(['Year','Month'])
sg

And I want to compare the months of two years with line plots. I attempted to do this as follows:

sns.set_style('whitegrid')
fig,ax = plt.subplots(figsize=(15,7))


chart=sns.lineplot(x=sg['Month'], y=sg['price'], ax=ax)
sns.despine(left=True)

and I get the this visualization:

But I want to create an image like this:

Answer 1

Add a hue or a style parameter .

sns.set_style('whitegrid')
fig,ax = plt.subplots(figsize=(15,7))


chart=sns.lineplot(x='Month', y='price', hue='Year', data=sg)
sns.despine(left=True)

If you do not want the background color which is ci parameter add ci=None .

Also, notice how I added data=sg and I removed sg[...] before x and y . ax=ax is not needed as well.