Questions tagged [groupby]
A groupby operation: splits the data, applies a function to each group, and combines the results.
26
questions
-1
votes
0
answers
28
views
How to constrain a dataframe to specific date range?
I have a dataframe that I would like to chunck- or rather run temporal sentiment analysis at different times. I am trying to measure how sentiment changes as part of user identity in extremist social ...
0
votes
1
answer
37
views
Using Pandas.groupby.agg with multiple columns and functions
I have a data frame which contains duplicates I'd like to combine based on 1 column (name). In half of the other columns I'd like to keep one value (as they should all be the same) whereas I'd like to ...
- 3
1
vote
1
answer
26
views
Grouping by Multi-Indices of both Row and Column [closed]
I have created a table using Pandas following material from here.
The table created makes use of Multi-Indices for both columns and rows.
I am trying to compute the descriptive statistics for each ...
- 11
0
votes
1
answer
22
views
Applied and view jobs ratio
I have the following data set where the column "kind" can be V(view) or A(apply), how can I do the following things given a particular job id how many applicant Apply (A) to that particular ...
- 105
0
votes
1
answer
39
views
How to find median/average values between data frames with slightly different columns?
I am trying to combat run-to-run variance of the data I collect by combining the data from different runs and finding the mean/average. The problem is that in each run there is a chance that some of ...
- 23
0
votes
1
answer
23
views
panda grouping dates by variable with transposed value variables
I had read this post
panda grouping by month with transpose
and it gave me the nearest answer to my question but not the completely solution.
How would I get somewhat like the reverse output?
My ...
- 1
1
vote
1
answer
322
views
pandas groupby.count doesn't count zero occurrences
I am using groupby.count for 2 columns to get value occurrences under a class constraint. However, if value $x$ in feature never occurs with class $y$, then this pandas method returns only non-zero ...
- 13
1
vote
0
answers
77
views
MongoDB Groupby Rank [closed]
Im Working With Mongodb And Wanted to do a query using Aggregate fucntion. Query Is ...
- 11
0
votes
1
answer
189
views
Using user defined function in groupby
I am trying to use the groupby functionality in order to do the following given this example dataframe:
...
0
votes
0
answers
39
views
Accessing group elements in groupby
I had a doubt about groupby operations. Lets suppose I have grouped my data based on one column and got 5 groups as output. I know that we can iterate over these groups and apply functions to them as ...
- 41
0
votes
1
answer
45
views
Access keys of pandas dataframe when using groupby
I have the following database:
And I would like to know how many times a combination of BirthDate and Zipcode is repeated throughout the data table:
Now, my question is: How can I access the keys of ...
- 113
-1
votes
3
answers
4k
views
Pandas Groupby datetime by multiple hours [closed]
I have a log dataset which looks like the following:-
...
0
votes
1
answer
734
views
Pandas - Avoid boolean result when using groupby()
I have this script:
sectors = df.groupby(['company_sector']).mean()['investment_in_millions']
Output:
I wanted to keep the same groupy() but having a result ...
- 99
1
vote
0
answers
25
views
Why is the behaviour of groupby command different in R and in python with pandas? [closed]
if I execute the following lines of codes in R as well as python for groupby command, the order of the resulting ...
- 135
4
votes
1
answer
18k
views
How to use df.groupby() to select and sum specific columns w/o pandas trimming total number of columns
I got Column1, Column2, Column3, Column4, Column5, Column6
I'd like to group Column1 and get the row sum of Column3,4 and 5
When I apply groupby() and get this that is correct but it's leaving out ...
- 99
1
vote
1
answer
132
views
pandas groupby and sort values
I am studying for an exam and encountered this problem from past worksheets:
This is the data frame called 'contest' with granularity as each submission of question from each contestant in the math ...
- 13
1
vote
1
answer
1k
views
3
votes
0
answers
24
views
User defined aggregations on data of around 200GB where row order matters
I am working with "medium large" data of around 200GB. The data are long form log files, where there are several thousand logs for each "entity". The entities are actually flights ...
- 226
1
vote
0
answers
35
views
Custom DataFrame format for exporting to excel sheets
I have the following DataFrame and I want it exported in an excel file with different sheets having different words as shown in the image
...
- 301
0
votes
2
answers
128
views
Calculating Median and Mode of numerical variables for different subgroups in R
I have customer call data and I want to get the median and mode for the call success rate for different subgroups.
My variables are: Customer ID, Employment Status (Retired, Employed, Unemployed), ...
- 53
1
vote
1
answer
290
views
How to group by one column and count frequency from other column for each item in the previous column in python?
I am trying to group my data by the 'ID' column. Then I want to count the frequency of 'sequence' for each 'ID'. Here is a sample of the data frame:
...
- 21
0
votes
1
answer
318
views
How to combine rows after Pandas Groupby function
May I know how to combine several rows into one single row after I used Pandas groupby function?
In below example, I would like to to group the data by Employee ID, Customer Last Name and Customer ...
- 1
2
votes
1
answer
237
views
Normalize data from different groups
I have data that has been grouped into 27 groups by different criteria. The reason for these groupings is to show that each group has different behavior. However, I would like to normalize everything ...
- 141
1
vote
1
answer
144
views
Group_by 2 variables and pivot_wider distribution based on 2 others
Performing some calculations on a dataframe and stuck trying to calculate a few percentages. Trying to append 3 additional columns added for %POS/NEG/NEU. E.g., the sum of amount col for all ...
- 31
1
vote
0
answers
19
views
Pushing down Group By clause [closed]
I've studied this exercise in class
But I cannot figure out why, when I push down the Group By clause, I can remove RLCode attribute from GroupBy. Does this action change the meaning of query tree?
- 25
0
votes
1
answer
299
views
Problem with sort by and group by in pandas
I have a DataFrame with duplicate id's but have different dates.
For Example:
...
- 1