python reader graph gives a blank canvass

Question

Mtcars is a public dataset in R. I'm not sure it's a public dataset in python.

mtcars <- mtcars

I created this boxplot in R and part of what I'm doing is reordering the y-axis with the reorder() function.

ggplot(mtcars, aes(x = mpg, y = reorder(origin, mpg), color = origin)) +
  geom_boxplot() + 
  theme(legend.position = "none") +
  labs(title = "Mtcars", subtitle = "Box Plot") +
  theme(plot.title = element_text(face = "bold")) +
  ylab("country")

Now in python I have this boxplot that I created with seaborn:

plt.close()

seaborn.boxplot(x="mpg", y="origin", data=mtcars)
plt.suptitle("Mtcars", x=0.125, y=0.97, ha='left', fontweight = 'bold')
plt.title("boxplot", loc = 'left')
plt.show()

I'm trying to render it now but the same kind of treatment for R doesn't work.

plt.close()

seaborn.boxplot(x="mpg", y=reorder("origin", 'mpg'), data=mtcars)
plt.suptitle("Mtcars", x=0.125, y=0.97, ha='left', fontweight = 'bold')
plt.title("boxplot", loc = 'left')
plt.show()

It's not surprising it doesn't work because it's a different language; I do know that! But how would I do this reordering in python using Seaborn? I'm having trouble understanding if this is even part of the plotting process.

https://stackoverflow.com/q/39214484/7758804 – Trenton McKinney Apr 29 '22 at 17:59 — Trenton McKinney, Apr 29 '22 at 17:59

score 0 · Accepted Answer · answered Apr 29 '22 at 18:00

0

You can compute a custom order and feed it to seaborn's boxplot order parameter:

import seaborn as sns

mtcars = sns.load_dataset('mpg')

order = mtcars.groupby('origin')['mpg'].median().sort_values(ascending=False)

sns.boxplot(x="mpg", y="origin", data=mtcars, order=order.index)

plt.suptitle("Mtcars", x=0.125, y=0.97, ha='left', fontweight = 'bold')
plt.title("boxplot", loc = 'left')
plt.show()

NB. order also acts like a filter, so if values are missing, of non-existent they will be omitted in the graph

output:

answered Apr 29 '22 at 18:00

mozway

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Your answer is also pointing out that my original boxplot was sorted by the mean, which is apparently a default in R and maybe median in this case is the better option – hachiko Apr 29 '22 at 18:11
@hachiko here you can use any function you want (mean, median, min, max, std…) – mozway Apr 29 '22 at 18:13

python reader graph gives a blank canvass

1 Answers1