Questions tagged [dataframe]
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8 questions
7
votes
3
answers
435
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Polars crosstable between two variables in a dataframe
I wrote a function that computes the cross tabulation between two variables in a polars dataframe.
It supports absolute values, row percentages, column percentages ...
- 173
4
votes
1
answer
205
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Finding specific promotions from two columns [closed]
I'm trying to build a function that identifies those who are promoted into a list of jobcodes, or are promoted within that list of jobcodes.
Initially I was using ...
- 41
1
vote
1
answer
103
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Replace iterrow loops in pandas matrices with something else to shorten the running time
This post is modified from this one: https://codereview.stackexchange.com/posts/292885/edit (Alternatives to iterrow loops in python pandas dataframes).
I have a piece of code to calculate price ...
- 81
6
votes
2
answers
728
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Alternatives to iterrow loops in python pandas dataframes
I have a piece of code to calculate price sensitivity based on the product and its rating.
Below is the original data set with product type, reported year, customer’s rating, price per unit, and ...
- 81
2
votes
1
answer
56
views
Maintain a log containing values if certain conditions are met
I'm trying to capture profits and set a stop loss in my trading strategy. I want the stop loss to be set daily based on the past data and if the current price, i.e., price for the date falls below the ...
- 222
1
vote
2
answers
97
views
Split Pandas dataset column based on values (suffixes: string operation)
In Python using Pandas, I am splitting a dataset column into 4 lists based on the suffix of the values. For the 3 suffixes I am using a list comprehension then for the 4th one, a set operation that ...
- 111
3
votes
1
answer
606
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Quickly create polars data frame from 2D ndarray
I am sampling from m normal distributions n times each, and storing the samples in a 2-dimensional ndarray. I then need to turn this into a polars dataframe as I need to add some string columns and do ...
- 151
4
votes
2
answers
232
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Unstructured to Structured TOC
The following code tries to convert an unstructured TOC with bounding box layout data given by the output of pdftotext -bbox-layout -f 11 -l 13 new_book.pdf toc.html...
- 427