I am trying to create a polar plot with a log scale on the radial axis but I keep getting an error or I get a missed up plot.
This is the code that I use:

import pandas as pd
import numpy as np
import matplotlib.pyplot as plt

metabolites = data[["metabolite"]]
intercepts = data[["intercept"]]
amplitudes= data[["amplitude"]]
acrophases = data[["acrophase"]]
ind = data[["Unnamed: 0"]]

N = metabolites.count()
N = N.values
N = N[0]

metabolites = metabolites.values
acrophases = acrophases.values
amplitudes = amplitudes.values
ind = ind.values
colors = plt.cm.gist_rainbow(ind[:,0]/len(acrophases))
width = np.zeros((N,1)) + 0.3

for i in range(len(acrophases)):
if acrophases[i] <0:
acrophases[i] = acrophases[i]+ np.pi

acrophases = acrophases[:,0]
amplitudes = amplitudes[:,0]
width1 = width[:,0]
metabolites = metabolites[:,0]
fig = plt.figure()
ax = plt.subplot(111, projection='polar')

for j in range(len(acrophases)):
ax.bar(acrophases[j], amplitudes[j], width=0.3, bottom=0.0, align='center', color=colors[j], label=metabolites[j])
handles, labels = ax.get_legend_handles_labels()
ax.set_xticklabels(['0', '3', '6', '9', '12', '15', '18', '21'])

ax.set_rlim((1.0, 10000.0))
ax.set_rscale('log')
fig.savefig('plot.tiff', dpi=600)
plt.show()