seaborn displot() is not plotting within defined subplots

问题

I am trying to plot two displots side by side with this code

fig,(ax1,ax2) = plt.subplots(1,2)

sns.displot(x =X_train['Age'], hue=y_train, ax=ax1)
sns.displot(x =X_train['Fare'], hue=y_train, ax=ax2)

It returns the following result (two empty subplots followed by one displot each on two lines)-

If I try the same code with violinplot, it returns result as expected

fig,(ax1,ax2) = plt.subplots(1,2)

sns.violinplot(y_train, X_train['Age'], ax=ax1)
sns.violinplot(y_train, X_train['Fare'], ax=ax2)

Why is displot returning a different kind of output and what can I do to output two plots on the same line?

回答1:

From the documentation for seaborn.distplot, which has been DEPRECATED in seaborn 0.11.
.distplot is replaced with the following:
- displot(), a figure-level function with a similar flexibility over the kind of plot to draw. This is a FacetGrid, and does not have the ax parameter.
- histplot(), an axes-level function for plotting histograms, including with kernel density smoothing. This does have the ax parameter.
Because the histogram of two different columns is desired, it better to use histplot.

fig,(ax1,ax2) = plt.subplots(1,2)

sns.histplot(x=X_train['Age'], hue=y_train, ax=ax1)
sns.histplot(x=X_train['Fare'], hue=y_train, ax=ax2)

Example

With the data in a wide format, use sns.histplot

import seaborn as sns

# load data
penguins = sns.load_dataset("penguins", cache=False)

# display(penguins.head())
  species     island  bill_length_mm  bill_depth_mm  flipper_length_mm  body_mass_g     sex
0  Adelie  Torgersen            39.1           18.7              181.0       3750.0    MALE
1  Adelie  Torgersen            39.5           17.4              186.0       3800.0  FEMALE
2  Adelie  Torgersen            40.3           18.0              195.0       3250.0  FEMALE
3  Adelie  Torgersen             NaN            NaN                NaN          NaN     NaN
4  Adelie  Torgersen            36.7           19.3              193.0       3450.0  FEMALE

# set x and y
x, y = penguins.bill_length_mm, penguins.bill_depth_mm

# plot
fig, (ax1, ax2) = plt.subplots(1, 2)

sns.histplot(x, ax=ax1)
sns.histplot(y, ax=ax2)
plt.tight_layout()

With the dataframe in a long format, use displot

# create a long dataframe
dfl = pd.DataFrame(penguins[['species', 'bill_length_mm', 'bill_depth_mm']].set_index('species').stack()).reset_index().rename(columns={'level_1': 'bill_size', 0: 'vals'})

# disply(dfl.head())
  species       bill_size  vals
0  Adelie  bill_length_mm  39.1
1  Adelie   bill_depth_mm  18.7
2  Adelie  bill_length_mm  39.5
3  Adelie   bill_depth_mm  17.4
4  Adelie  bill_length_mm  40.3

# plot
sns.displot(data=dfl, x='vals', col='bill_size', kind='hist')

来源：https://stackoverflow.com/questions/63895392/seaborn-displot-is-not-plotting-within-defined-subplots

标签

python

data-visualization

seaborn