Recent questions tagged pandas

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I am transitioning from R to Python. I just began using Pandas. I have an R code that subsets nicely: k1 <- ... = c(Time, Product)) thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - collect() or toPandas() on a large DataFrame in pyspark/EMR

I have an EMR cluster of one machine "c3.8xlarge", after reading several resources, I understood that I have ... about what is happening here? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - Find date range overlap in python

I am trying to find an more efficient way of finding overlapping data ranges (start/end dates provided per row ... find range overlap in python? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - How to copy/paste DataFrame from Stack Overflow into Python

In questions and answers, users very often post an example DataFrame which their question/answer works with: In []: x ... . How can I do this? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - Read a small random sample from a big CSV file into a Python data frame

The CSV file that I want to read does not fit into main memory. How can I read a few (~10K) random ... and do some simple statistics on the selected data frame? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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pandas - Python - rolling functions for GroupBy object

I have a time series object grouped of the type <pandas.core.groupby.SeriesGroupBy object at 0x03F1A9F0>. grouped.sum() gives the ... 3 3 b 3 4 b 7 5 b 12 Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - Selection with .loc in python

I saw this code in someone's iPython notebook, and I'm very confused as to how this code works. As far as I ... == 'versicolor', 'class'] = 'Iris-versicolor' Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.0k views

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pandas - Python: Convert timedelta to int in a dataframe

I would like to create a column in a pandas data frame that is an integer representation of the number of days in a ... 7 days, 23:29:00 day integer column 7 Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - How can I one hot encode in Python?

I have a machine learning classification problem with 80% categorical variables. Must I use one hot encoding if I ... of the features. What do you recommend? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - Show DataFrame as table in iPython Notebook

I am using iPython notebook. When I do this: df I get a beautiful table with cells. However, if i do ... to print out the beautiful tables for both datasets? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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pandas - Python matplotlib multiple bars

How to plot multiple bars in matplotlib, when I tried to call the bar function multiple times, they overlap and as ... x-axes and bars are next to each other: Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

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pandas - How to split data into 3 sets (train, validation and test)?

I have a pandas dataframe and I wish to divide it to 3 separate sets. I know that using train_test_split from ... split the data into 3 sets instead of 2? Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

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pandas - Convert Python dict into a dataframe

I have a Python dictionary like the following: {u'2012-06-08': 388, u'2012-06-09': 388, u'2012-06-10' ... the columns: s = Series(my_dict,index=my_dict.keys()) Question&Answers:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.3k views

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pandas - How to get the value of a cell based on filtering efficently

If I have a dataframe and want to have the value of a cell based on a condition/filter, it seems not to be ... /how-to-get-the-value-of-a-cell-based-on-filtering-efficently...