Python | Pandas Series.is_monotonic_increasing

Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric python packages. Pandas is one of those packages and makes importing and analyzing data much easier. Pandas series is a One-dimensional ndarray with axis labels. The labels need not be unique but must be a hashable type. The object supports both integer- and label-based indexing and provides a host of methods for performing operations involving the index. Pandas Series.is_monotonic_increasing attribute return a boolean value. It returns True if the data in the given Series object is monotonically increasing else it return False.

Syntax:Series.is_monotonic_increasing Parameter : None Returns : boolean

Example #1: Use Series.is_monotonic_increasing attribute to check if the underlying data in the given Series object is monotonically increasing or not. Python3

# importing pandas as pd
import pandas as pd

# Creating the Series
sr = pd.Series(['New York', 'Chicago', 'Toronto', 'Lisbon'])

# Creating the row axis labels
sr.index = ['City 1', 'City 2', 'City 3', 'City 4'] 

# Print the series
print(sr)

Output : Now we will use Series.is_monotonic_increasing attribute to check if the underlying data in the given Series object is monotonically increasing or not. Python3 1==

# check if monotonically increasing
sr.is_monotonic_increasing

Output : As we can see in the output, the Series.is_monotonic_increasing attribute has returned False indicating the underlying in the given series object is not monotonically increasing.   Example #2 : Use Series.is_monotonic_increasing attribute to check if the underlying data in the given Series object is monotonically increasing or not. Python3

# importing pandas as pd
import pandas as pd

# Creating the Series
sr = pd.Series(['1/1/2018', '2/1/2018', '3/1/2018', '4/1/2018'])

# Creating the row axis labels
sr.index = ['Day 1', 'Day 2', 'Day 3', 'Day 4']

# Print the series
print(sr)

Output : Now we will use Series.is_monotonic_increasing attribute to check if the underlying data in the given Series object is monotonically increasing or not. Python3 1==

# check if monotonically increasing
sr.is_monotonic_increasing

Output : As we can see in the output, the Series.is_monotonic_increasing attribute has returned True indicating the underlying in the given series object is monotonically increasing.