Search code examples
pythonseaborn

Log-log lmplot with seaborn


Can Seaborn's lmplot plot on log-log scale?

This is lmplot with linear axes:

import numpy as np
import pandas as pd
import seaborn as sns
x =  10**arange(1, 10)
y = 10** arange(1,10)*2
df1 = pd.DataFrame( data=y, index=x )
df2 = pd.DataFrame(data = {'x': x, 'y': y}) 
sns.lmplot('x', 'y', df2)

sns.lmplot('x', 'y', df2):

sns.lmplot [2]:


Solution

  • If you just want to plot a simple regression, it will be easier to use seaborn.regplot. This seems to work (although I'm not sure where the y axis minor grid goes)

    import numpy as np
    import pandas as pd
    import seaborn as sns
    import matplotlib.pyplot as plt
    
    x = 10 ** np.arange(1, 10)
    y = x * 2
    data = pd.DataFrame(data={'x': x, 'y': y})
    
    f, ax = plt.subplots(figsize=(7, 7))
    ax.set(xscale="log", yscale="log")
    sns.regplot("x", "y", data, ax=ax, scatter_kws={"s": 100})
    

    enter image description here

    If you need to use lmplot for other purposes, this is what comes to mind, but I'm not sure what's happening with the x axis ticks. If someone has ideas and it's a bug in seaborn, I'm happy to fix it:

    grid = sns.lmplot('x', 'y', data, size=7, truncate=True, scatter_kws={"s": 100})
    grid.set(xscale="log", yscale="log")
    

    enter image description here