Appending & concatenating Series
MERGING DATAFRAMES WITH PANDAS
Appending & concatenating
Series
append()
.append(): Series & DataFrame method Invocation:
s1.append(s2) Stacks rows of s2 below s1 Method for Series & DataFrames
Merging DataFrames with pandas
concat()
concat(): pandas module function Invocation:
pd.concat([s1, s2, s3]) Can stack row-wise or column-wise
Merging DataFrames with pandas
concat() & .append()
Equivalence of concat() & .append(): result1 = pd.concat([s1, s2, s3]) result2 = s1.append(s2).append(s3)
result1 == result2 elementwise
Merging DataFrames with pandas
Series of US states
Merging DataFrames with pandas
In [1]: import pandas as pd
In [2]: northeast = pd.Series(['CT', 'ME', 'MA', 'NH', 'RI', 'VT', ...: 'NJ', 'NY', 'PA'])
In [3]: south = pd.Series(['DE', 'FL', 'GA', 'MD', 'NC', 'SC', 'VA', ...: 'DC', 'WV', 'AL', 'KY', 'MS', 'TN', 'AR', 'LA', 'OK', 'TX'])
In [4]: midwest = pd.Series(['IL', 'IN', 'MN', 'MO', 'NE', 'ND', ...: 'SD', 'IA', 'KS', 'MI', 'OH', 'WI'])
In [5]: west = pd.Series(['AZ', 'CO', 'ID', 'MT', 'NV', 'NM', ...: 'UT', 'WY', 'AK', 'CA', 'HI', 'OR','WA'])
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