Python | Pandas Series.std() Last Updated : 05 Feb, 2019 Summarize Comments Improve Suggest changes Share Like Article Like Report 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.std() function return sample standard deviation over requested axis. The standard deviation is normalized by N-1 by default. This can be changed using the ddof argument. Syntax: Series.std(axis=None, skipna=None, level=None, ddof=1, numeric_only=None, **kwargs) Parameter : axis : {index (0)} skipna : Exclude NA/null values. If an entire row/column is NA, the result will be NA level : If the axis is a MultiIndex (hierarchical), count along a particular level, collapsing into a scalar ddof : Delta Degrees of Freedom. The divisor used in calculations is N - ddof, where N represents the number of elements. numeric_only : boolean, default None Returns : std : scalar or Series (if level specified) Example #1 : Use Series.std() function to find the standard deviation of the given Series object. Python3 # importing pandas as pd import pandas as pd # Creating the Series sr = pd.Series([100, 25, 32, 118, 24, 65]) # Print the series print(sr) Output : Now we will use Series.std() function to find the standard deviation of the given Series object. Python3 1== # find standard-deviation along the # 0th index sr.std() Output : As we can see in the output, Series.std() function has successfully calculated the standard deviation the given Series object. Example #2 : Use Series.std() function to find the standard deviation of the given Series object. We have some missing values in our series object, so skip those missing values. Python3 # importing pandas as pd import pandas as pd # Creating the Series sr = pd.Series([19.5, 16.8, None, 22.78, None, 20.124, None, 18.1002, None]) # Print the series print(sr) Output : Now we will use Series.std() function to find the standard deviation of the given Series object. Python3 1== # find standard-deviation along the # 0th index sr.std(skipna = True) Output : As we can see in the output, Series.std() function has successfully calculated the standard deviation the given Series object. If we do not skip the missing values then the output will be NaN. Comment More infoAdvertise with us Next Article Python | Pandas Series.std() S Shubham__Ranjan Follow Improve Article Tags : Pandas Python-pandas Python pandas-series-methods AI-ML-DS With Python Similar Reads Python Pandas - DataFrame.copy() function The DataFrame.copy() function in Pandas allows to create a duplicate of a DataFrame. 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