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I am not really good with pandas, and I think pandas should solve my problem: I have a text file, t… Read more Python - Drop Duplicate Based On Max Value Of A Column

Assume that I have a set of data pair where index 0 is the value and index 1 is the type: input = [… Read more Python Group By

I've got some grouped tabular data, and in this data there's a column for which each data p… Read more Difference Of Sets Of Multiple Values For Single Column In Pandas

I'm attempting to group by two factors in a long (>2M) rows. Background to the data The seco… Read more Groupby To Return Nth Group - Not Row

I have 2 pandas dataframes which looks like below. Data Frame 1: Section Chainage Frame R… Read more Pandas Merge And Grouby

Suppose I have a large dataframe like this: A B C 27/6/2017 4:00:00 928.… Read more Split Dataframes In Groups And Sub-groups And Store The Output In A Csv File

if the dataframe is given as below index yearmon college major gpa num 0 20140401 1 … Read more Recalculate Mean Considering Each Count

I have created a cross tabulation in pandas using: grouped_missing_analysis = pd.crosstab(clean_ses… Read more How To Filter A Crosstab Created In Pandas By A Specific Column

I have a multi-year time series an want the bounds between which 95% of my data lie. I want to look… Read more Pandas Efficient Groupby Season For Every Year

Given the following dataframe: col_a | col_b_tosum b | 5 b | 5 b | … Read more Pandas Show Group Sum On All Rows

I have a dataframe as follows: ref, type, amount 001, foo, 10 001, foo, 5 001, bar, 50 001, bar, 5 … Read more Pandas Groupby Sum

I'm going from SQLite to Postgresql. This has made one of my queries not work. It's not cle… Read more How To Fetch Rows With Max Update Datetime Using Group By And Having With Sqlalchemy And Postgresql

Let's say my dataframe looks something like this: date,site,country_code,kind,ID,rank,votes,ses… Read more Pandas - Convert Cumulative Value To Actual Value

I have a dataframe with multiple columns along with a date column. The date format is 12/31/15 and … Read more Pandas - Split Dataframe Into Multiple Dataframes Based On Dates?

I'm using Python, and I have a dataset of 6 columns, R, Rc, J, T, Ca and Cb. I need to 'agg… Read more How To Groupby And Pivot A Dataframe With Non-numeric Values

I am attempting to show the top three values of nc_type for each month. I tried using n_largest but… Read more Attempting To Find The 5 Largest Values Per Month Using Groupby

My dataframe consists of students, dates, and test scores. I want to find the max date for each stu… Read more Groupby Max Value And Return Corresponding Row In Pandas Dataframe

My dataframe looks like ID colA 1 B 1 D 2 B 2 D 2 C… Read more Get All Rows After The Last Occurrence Of A Specific Value In Pandas

I've tried Pandas and Numpy but haven't seen the result I want. I have a simple array that… Read more "group By" Function In Python For Array

I have a pandas groupby object, c: >>> c.index.names FrozenList([u'Thing1', u'… Read more Pandas - Select Values From A Groupby Object