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df1=pd.DataFrame(d1) Write the python statement using suitable functions among (apply/ apply_map / sum() / mean() ... Order By is used to arrange the records in Ascending/Descending order on specified column where as Group by is used to group data based on common values.
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CLASS XII. INFORMATICS PRACTICES NEW (065) I PREBOARD (2019-20) Max Marks: 70Time: 3 hrs. General Instructions: All questions are compulsory. Question Paper is …
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pivot() is used for pivoting without aggregation. Therefor, it can’t deal with duplicate values for one index/column pair. pivot_table is a generalization of pivot that can handle duplicate values for one pivoted index/column pair. Specifically, you can give pivot_table a list of aggregation functions using keyword argument aggfunc.
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Here’s a simplified visual that shows how pandas performs “segmentation” (grouping and aggregation) based on the column values! Pandas .groupby in action. Let’s do the above presented grouping and aggregation for real, on our zoo dataframe! We have to fit in a groupby keyword between our zoo variable and our .mean() function:
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Write a command to find the average of marks1 column of df2 dataframe. df2['marks1'].mean() 3(1 mark for each correct answer) Ans. English Chemistry Maths Physics ... 4 python manage.py startapp abc (1 mark for correct answer) an alternate key ... A Smart mob is an organized group of people who have gathered through the use of social media to ...
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Write python statement to create a one –dimensional array using arrange() function .Elements will be in the range 10 to 30 with a step of 4 (including both 10 and 30). Reshape this one-dimensional array to two dimensional array of shape(2,3).
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Q.4 Why does python change the datatype of a column as soon as it stores an empty value(NaN) even though it has all other values stored as integer. Q.5 Write code statements to list the following, from a dataframe namely sales.
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Python dataframe group by column