Advertisements

I am plotting a histogram using `seaborn`

, along with a KDE curve and a Gaussian fit, but the instruction `label = "KDE fit"`

in `sns.histplot`

is inappropriately displayed in color, as it seems to refer to the whole histogram… Is there a way to specifically label the KDE curve so as to appear in the `legend`

box as a solid green line (just as the Gaussian fit appears as a dashed red line)?

The full code I used is below:

```
import numpy as np
import matplotlib.pylab as plt
import seaborn as sns
import scipy.stats as stats
from scipy.stats import norm
# Generating data
np.random.seed(63123)
data = np.random.normal(loc = 600, scale = 30, size = 20)
# Parameters for histogram plotting
min_val = data.min()
max_val = data.max()
val_width = max_val - min_val
n_bins = 7
bin_width = val_width/n_bins
list_xticks_raw = np.arange(min_val - bin_width/2, max_val + bin_width/2, bin_width).tolist()
list_xticks_round = [round(x) for x in list_xticks_raw]
# Histogram and Gaussian fit plotting
fig = plt.figure(figsize = (4,4))
h = sns.histplot(data = None, x = data , bins = n_bins, binrange=(min_val, max_val), discrete = False, shrink = 1.0,
stat = "density", element = "bars", color = "green", kde = True, label = "KDE fit")
plt.xlim(min_val - bin_width/2, max_val + bin_width/2) # Define x-axis limits
plt.xticks(list_xticks_round)
mu, sigma = stats.norm.fit(data)
sorted_data = np.sort(data)
gaussian_fit = stats.norm.pdf(sorted_data, mu, sigma)
plt.plot(sorted_data, gaussian_fit, linestyle = "--", color = "red", label = "Gaussian fit")
plt.legend()
plt.show()
```

### >Solution :

Use the `line_kws`

parameter instead of `label`

:

```
h = sns.histplot(data = None, x = data , bins = n_bins, binrange=(min_val, max_val), discrete = False, shrink = 1.0,
stat = "density", element = "bars", color = "green", kde = True, line_kws={'label': "KDE fit"})
```

Output: