How to plot bar chart in Python using matplotlib.pyplot ? Argument height must be 'xxxx' or scalar

Question

I have a data frame named 'train' which has number of variables. One such variable is 'industry'. The first 10 elements of column 'industry' are as follows:

train['industry'][:10]
0    Office supplies    
1    Unknown            
2    Misc services      
3    Social services    
4    Unknown            
5    Manufacturing      
6    Social services    
7    Office supplies    
8    Entertainment      
9    Construction       
Name: industry, dtype: object

I am trying to plot a bar chart using matplotlib.pyplot as plt library with industry type on x-axis and their frequency on y-axis. I am not really sure what to should be the value of 'height' argument?

plt.bar(train['industry'], height = )

Answer 1

Height is your frequency. Here's an example

1. Make array of length len(train.index)

2. Make your bar chart without the industry names - plt.bar(array, frequency) . The frequency/height cannot be a string. It needs to be numerical. If it isn't, convert it using pd.to_numeric

3. Put industry names into an array

4. use set_xticklabels(industries) to change the labels