Combine two columns of text in pandas dataframe

Question

I have a 20 x 4000 dataframe in Python using pandas. Two of these columns are named Year and quarter. I\'d like to create a variable called p

Answer 1

Let us suppose your dataframe is df with columns Year and Quarter.

import pandas as pd
df = pd.DataFrame({'Quarter':'q1 q2 q3 q4'.split(), 'Year':'2000'})

Suppose we want to see the dataframe;

df
>>>  Quarter    Year
   0    q1      2000
   1    q2      2000
   2    q3      2000
   3    q4      2000

Finally, concatenate the Year and the Quarter as follows.

df['Period'] = df['Year'] + ' ' + df['Quarter']

You can now print df to see the resulting dataframe.

df
>>>  Quarter    Year    Period
    0   q1      2000    2000 q1
    1   q2      2000    2000 q2
    2   q3      2000    2000 q3
    3   q4      2000    2000 q4

If you do not want the space between the year and quarter, simply remove it by doing;

df['Period'] = df['Year'] + df['Quarter']