我正在尝试使用具有不同x组和其他色调的seaborn生成箱线图.看到这段代码：

tips = sns.load_dataset("tips")

sns.stripplot(x="day", y="total_bill", hue="smoker",
              data=tips, jitter=True,
              palette="Set2", split=True,linewidth=1,edgecolor='gray')

sns.boxplot(x="day", y="total_bill", hue="smoker",
            data=tips,palette="Set2",fliersize=0)

我希望每个x箱图(在这个例子中,每天)都是不同的颜色,而每个色调(在这种情况下,吸烟者/非吸烟者)在swarmplot上用不同的符号表示.

我试图使用调色板参数,但没有得到我想要的.我也尝试直接与艺术家一起玩,但是由于某些原因改变boxplot的facecolor也改变了edgecolor,我不知道如何改变swarmplot上的符号.

最佳答案 我意识到,
when answering this question,我从未提出过我自己的解决方案,尽管我刚刚在一起之前就已经破解了一些东西.

# From itertools' receipes https://docs.python.org/3/library/itertools.html#itertools-recipes
from itertools import zip_longest
def grouper(iterable, n, fillvalue=None):
    "Collect data into fixed-length chunks or blocks"
    # grouper('ABCDEFG', 3, 'x') --> ABC DEF Gxx"
    args = [iter(iterable)] * n
    return zip_longest(*args, fillvalue=fillvalue)


fig, ax = plt.subplots()
# dummy plots, just to get the Path objects
a = ax.scatter([1,2],[3,4], marker='s')
b = ax.scatter([1,2],[3,4], marker='^')
square_mk, = a.get_paths()
triangle_up_mk, = b.get_paths()
a.remove()
b.remove()

sns.swarmplot(x="day", y="total_bill", hue="smoker", data=tips, dodge=True, size=6, lw=2, edgecolor='k')
swarm_cols = ax.collections

sns.boxplot(x="day", y="total_bill", hue="smoker", data=tips, fliersize=0)
box_cols = ax.artists

ax.legend_.remove()

N_cats = len(np.unique(tips.day))
N_hues = len(np.unique(tips.smoker))
print(N_cats,N_hues)

pastels = matplotlib.cm.get_cmap('Pastel1')
cat_colors =  [pastels(x) for x in np.linspace(0,1,N_cats)]
hue_markers = [square_mk, triangle_up_mk]

for boxes,color in zip(grouper(box_cols, N_hues),cat_colors):
    for box in boxes:
        box.set_facecolor(color)
for swarms,color in zip(grouper(swarm_cols, N_hues), cat_colors):
    for swarm,marker in zip(swarms,hue_markers):
        print(swarm, len(swarm.get_offsets()))
        swarm.set_paths([marker])
        swarm.set_facecolors([color])
        swarm.set_linewidths([1.])
        swarm.set_edgecolors(['xkcd:dark grey'])

# recreate legend
for swarm,marker in zip(swarm_cols[-2:],hue_markers):
    print(swarm, len(swarm.get_offsets()))
    swarm.set_paths([marker])
    swarm.set_facecolors(["none"])
    swarm.set_linewidths([1.])
    swarm.set_edgecolors(['xkcd:dark grey'])
ax.legend(swarm_cols[-2:],np.unique(tips.smoker))