cannot perform reduce with flexible type plt.hist
matplotlib, python, text, word-frequency
Solution
You get this error because you need to convert your data to a numeric type. Your array contains strings.
import matplotlib.pyplot as plt
import numpy as np
data = [(' whitefield', 65299), (' bellandur', 57061), (' kundalahalli', 51769), (' marathahalli', 50639),
(' electronic city', 44041), (' sarjapur road junction', 34164), (' indiranagar 2nd stage', 32459),
(' malleswaram', 32171), (' yelahanka main road', 28901), (' domlur', 28869)]
freequency = []
words = []
for line in data:
freequency.append(line[1])
words.append(line[0])
y_axis = np.arange(1, len(words) + 1, 1)
plt.barh(y_axis, freequency, align='center')
plt.yticks(y_axis, words)
plt.show()
Problem
I have a dataset with 1000s of elements and their respective frquencies. i need to plot a histogram of the top 10 occurring elements. i did: ``` top_words = Counter(my_data).most_common() top_words_10 = top_words[:10] plt.hist(top_words_10,label='True') ``` and got this error : ``` TypeError Traceback (most recent call last) <ipython-input-29-ff974b3a2354> in <module>() 5 print top_words[:10] 6 ----> 7 plt.hist(top_words_10) C:\Anaconda\lib\site-packages\numpy\core\_methods.pyc in _amin(a, axis, out, keepdims) 12 def _amin(a, axis=None, out=None, keepdims=False): 13 return um.minimum.reduce(a, axis=axis, ---> 14 out=out, keepdims=keepdims) 15 16 def _sum(a, axis=None, dtype=None, out=None, keepdims=False): TypeError: cannot perform reduce with flexible type ``` Any idea?? my data looks like this : ``` [(' whitefield', 65299), (' bellandur', 57061), (' kundalahalli', 51769), (' marathahalli', 50639), (' electronic city', 44041), (' sarjapur road junction', 34164), (' indiranagar 2nd stage', 32459), (' malleswaram', 32171), (' yelahanka main road', 28901), (' domlur', 28869)] ```