[FIXED] searborn: maintain the order of palette color in legend

Issue

I make several plots my data using seaborn's displot. I cutomise the palette using the dictionary:

my_palette = {'car': 'b', 'foot':'k', 'metro':'c', 'bus':'r', 'bike':'y'} # values of hue

And then plot like so:

# fig customisation omitted for brevity
sns.displot(df1, x='distance', kind='ecdf', hue='mode', log_scale=True, palette=my_palette,)

Giving:

But then when I plot the next figure, the legend order change (as python dictionary isn't ordered), like this one:

sns.displot(df2, x='distance', kind='ecdf', hue='mode', log_scale=True, palette=my_palette,)

Which gives:

I am wondering if there's a way to maintained a defined ordering, such as foot, bike, bus, car, metro

Solution

You can use hue_order base order that you want and keys of your my_palette dict.

sns.displot(df2, x='distance', kind='ecdf', hue='mode', 
            log_scale=True, palette=my_palette,
            hue_order=['foot', 'bike', 'bus', 'car', 'metro']
            )

from doc:

hue_order: Specify the order of processing and plotting for categorical levels of the hue semantic.

Answered By - I'mahdi