Recent questions tagged Pandas

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pandas - How do I print entire number in Python from describe() function?

I am doing some statistical work using Python's pandas and I am having the following code to print out ... response is appreaciated. Thanks. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - seaborn multiple variables group bar plot

I have pandas dataframe, one index(datetime) and three variables(int) date A B C 2017-09-05 25 261 ... with Seaborn or other libraries? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - Web Scraping with Selenium Python [Twitter + Instagram]

I am trying to web scrape both Instagram and Twitter based on geolocation. I can run a query search but ... appreciated. Appreciate the help !! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas dataframe group and sort by weekday

I have pandas DataFrame that includes Day of Week column. df_weekday = df.groupby(['Day of Week']).sum() df_weekday ... 'Saturday', 'Sunday'. ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - Python TfidfVectorizer throwing : empty vocabulary; perhaps the documents only contain stop words"

I'm trying to use Python's Tfidf to transform a corpus of text. However, when I try to fit_transform ... string punctuated by newlines. Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - saving a dataframe to csv file (python)

I am trying to restructure the way my precipitations' data is being organized in an excel file. To do this, I' ... this problem) Many thanks !! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - NameError: name 'pd' is not defined

I am attempting run in Jupyter import pandas as pd import matplotlib.pyplot as plt # plotting import ... defined Any suggestions appreciated See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.2k views

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pandas - Python generating a list of dates between two dates

I want to generate a list of dates between two dates and store them in a list in string format. This list is ... '] Something wrong in my code. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - how to specify the datetime format in read_csv

I have a file where each row has this format: YYYY-MM-DD-HH-MM-SS uint64 float64 float64 uint64 I've read ... . Can I specify the exact format? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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pandas - Python TypeError: cannot convert the series to <class 'int'> when trying to do math on dataframe

I have a data frame that looks something like this: defaultdict(<class 'list'>, {'XYF': TimeUS GyrX GyrY GyrZ ... idea where to go from here. See Question&Answers more detail:os...

asked Oct 24, 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 write a large csv file to hdf5 in python?

I have a dataset that is too large to directly read into memory. And I don't want to upgrade the machine. ... into HDF5 file with python pandas. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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2.0k views

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pandas - to_sql() error querying sqlite_master table when writing to MySQL

I have a question about how to save a dataframe to my local mysql. import MySQLdb import pandas as pd conn= ... I can't save this dataframe. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

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pandas - Python: Divide each row of a DataFrame by another DataFrame vector

I have a DataFrame (df1) with a dimension 2000 rows x 500 columns (excluding the index) for which I want ... missing in the function df.divide? See Question&Answers more detail:os...

asked Oct 24, 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 plot statsmodels linear regression (OLS) cleanly

Problem Statement: I have some nice data in a pandas dataframe. I'd like to run simple linear regression on it: ... to work... not sure why: See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.4k views

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pandas - error using astype when NaN exists in a dataframe

df A B 0 a=10 b=20.10 1 a=20 NaN 2 NaN b=30.10 3 a=40 b=40.10 I tried : df['A'] = df['A' ... use np.object_ dtype in pandas How do I fix this ? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.7k views

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pandas - Python "TypeError: unhashable type: 'slice'" for encoding categorical data

I am getting TypeError: unhashable type: 'slice' when executing the below code for encoding categorical data in Python ... (X[:, 3]) See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.6k views

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pandas - Counting non zero values in each column of a dataframe in python

I have a python-pandas-dataframe in which first column is user_id and rest of the columns are tags(tag_0 to ... Any help shall be appreciated. See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1.1k views

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pandas - arranging text files side by side using python

I have 3000 text files in a directory and each .txt file contain single column data. i want to arrange them ... for the same using 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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1.1k views

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pandas - Not showing the total number of size in each bar in its graph in Python?

I have a problem about showing the numbers above each bar in its graph. Here is my dafaframe which is shown below. ... integer How can I fix it? See Question&Answers more detail:os...

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

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1.1k views

1 answer

pandas DataFrame selection by element in array

Trying to select subset of df based on the occurrence of an element in an array in the df. df = pd. ... options for df selection like 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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1.1k views

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pandas dataframe memory python

i want to transform a sparse matrix (156060x11780) to dataframe but i get a memory error this is my code vect = ... ). How can i solve it? See Question&Answers more detail:os...

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

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1.1k views

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pandas - computing the mean for python datetime

I have a datetime attribute: d = { 'DOB': pd.Series([ datetime.datetime(2014, 7, 9), datetime.datetime(2014 ... datetime.datetime(2014, 7, 12). 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 - Python - Iterate over a list of attributes

I have a feature in my data set that is a pandas timestamp object. It has (among many others) the following ... can pass it as an attribute? See Question&Answers more detail:os...

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

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1.2k views

1 answer

pandas - Reading a portion of a large xlsx file with python

I have a large .xlsx file with 1 million rows. I don't want to open the whole file in one go. I was ... (I prefer to use pandas for it.) See Question&Answers more detail:os...

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

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1.4k views

1 answer

pandas - Text Language detection in python

I am trying to detect the language of the text that may consist of an unknown number of languages. The following code ... i.e. English for 'en' See Question&Answers more detail:os...

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

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3.0k views

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pandas - Python: ufunc 'add' did not contain a loop with signature matching types dtype('S21') dtype('S21') dtype('S21')

I have two dataframes, which both have an Order ID and a date. I wanted to add a flag into the first ... ', '783679874'], dtype=object) See Question&Answers more detail:os...

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

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1.2k views

1 answer

pandas - Select a multiple-key cross section from a DataFrame

I have a DataFrame "df" with (time,ticker) Multiindex and bid/ask/etc data columns: tod last bid ask volume time ticker ... , 'GLD'], level=1) ? See Question&Answers more detail:os...

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

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1.7k views

1 answer

pandas - python: update dataframe to existing excel sheet without overwriting contents on the same sheet and other sheets

Struggling for this for hours so I decided to ask for help from experts here: I want to modify existing excel ... ' xfile.save('test2.xlsx') See Question&Answers more detail:os...

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

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