10 апр. 2013 г. · As of v0.20.0, you can use pd.DataFrame.sample, which can be used to return a random sample of a fixed number rows, or a percentage of rows.

20 июл. 2020 г. · I have a DataFrame of people and I want to randomly select 27% of them. I want to create a new Boolean column in that DataFrame that shows if that person was ...

22 янв. 2020 г. · I want to select 5 consecutive rows (at random). I've tried with .sample , but that just loads a random n rows that aren't consecutive.

26 сент. 2022 г. · The problem is that the code randomly selects indices of two different rows in each group and then uses the smaller index to get the final sample.

7 июн. 2019 г. · I only want to select 200 samples randomly, and create a new dataframe df_new which will have a new dimension of 15x200 = 3000 rows.

21 июл. 2020 г. · I'm trying to randomly select a row from a pandas DataFrame based on provided weights. I tried to use .sample() method with these parameters, but can't get the ...

25 окт. 2022 г. · I want to create a sample size of n=20000 where there are 40000 rows in total and 2 rows are consecutive/paired. I want to perform additional calculations on ...

28 нояб. 2021 г. · This should do the trick. For each row, set the col2 to a random int between 0 and 1. df["col2"] = df.apply(lambda x: randint(0,1), axis=1)

10 янв. 2013 г. · Using numpy, is there an easy way to get a new 2D array with, eg, 2 random rows from the initial array a (without replacement)?

2 июн. 2016 г. · I want a simple script to pick, for example, 5 rows, out randomly but only the rows that contains an ID, it should not include any row that does not contain an ...