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How can I best compare the frequency of categorical values from two datasets with Pandas?

I am trying to compare two sets of data, each with a long list of categorical variables using Pandas and Matplotlib. I want to get and somehow store the frequency of values for each variable using the value_counts() method for each data set so that I can later compare the two for statistically significant differences in those frequencies.

As of now I just have a function to display the values and counts for each column in a data frame as pie charts, given a list of columns (cat_columns) which is defined outside of the function:

def getCat(data):
    for column in cat_columns:
        
        plt.figure()
        df[column].value_counts().plot(kind='pie', autopct='%1.1f%%')
        plt.title(f"Distribution of {column} Patients in {dataname}")
        plt.ylabel('')
        
getCat(df)

Is it possible to append/store the returned values of value_counts() into a new DataFrame object corresponding to the each original data set so I can access and operate on those values later?

TIA!



source https://stackoverflow.com/questions/74174473/how-can-i-best-compare-the-frequency-of-categorical-values-from-two-datasets-wit

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