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How to check the data present in a Series object is monotonically decreasing or not?
To check if the data present in the series is monotonically decreasing or not, we can use the is_monotonic_decreasing property of the pandas Series constructor.
The monotonically decreasing data is nothing but continuously decreasing values. And the attribute “is_monotonic_decreasing” is used to verify that the data in a given series object is always decreasing or not. And this attribute returns a boolean value as an output.
Example 1
import pandas as pd
# create a series
s = pd.Series([100,57,23,10,5])
print(s)
print("Is monotonically decreasing: ", s.is_monotonic_decreasing)Explanation
Here, we initialized a Series with a python list of integer values of length 5. Then we applied the is_monotonic_decreasing property on our series object “s”.
Output
0 100 1 57 2 23 3 10 4 5 dtype: int64 Is monotonically decreasing: True
In the above output, we can see the initial series object, and also the output of the is_monotonic_decreasing attribute.
For the following example, The is_monotonic_decreasing attribute returns True. which means the data in the given series is continuously decreasing.
Example 2
import pandas as pd
# create a series
s = pd.Series(list("abcdef"))
print(s)
print("Is monotonically decreasing: ", s.is_monotonic_decreasing)
Explanation
Let’s take another example for checking if the values in a series object is monotonically decreasing or not. Here, we have initialized a series object with a python list of strings. After that, we applied the is_monotonic_decreasing property over the data of the series object “s”.
Output
0 a 1 b 2 c 3 d 4 e 5 f dtype: object Is monotonically decreasing: False
We got the boolean value “False” as a result of the following example. which means that the values present in the given series object is not decreasing continuously.
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