Recent questions tagged Dataframe

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Q: Combine two data frames by rows (rbind) when they have different sets of columns

I want to bind two data frames with different set of columns and I also want to retain all the columns that fails to ... do that in R? Select the correct answer from above options...

asked Jan 23, 2022 in Education by JackTerrance

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Q: Counting unique / distinct values by group in a data frame

I have a dataframe: > myvec name order_no 1 Nehal 12 2 sejal 14 3 sejal 16 4 shyam 11 5 Nehal 12 6 Sejal 16 ... Sejal 3 Shyam 1 Ram 1 Select the correct answer from above options...

asked Jan 23, 2022 in Education by JackTerrance

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Q: Drop data frame columns by name

I want to remove some questions from data frame, I know how to delete them individually using df$x...

asked Jan 23, 2022 in Education by JackTerrance

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Q: Delete column from pandas DataFrame

How to delete a column in a DataFrame, currently I am using: del df['column_1'] this is working fine, ... expected df.column_name ? Select the correct answer from above options...

asked Jan 22, 2022 in Education by JackTerrance

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Q: How to split data into 3 sets (train, validation and test)?

I wish to divide pandas dataframe to 3 separate sets. I know by using train_test_split from sklearn.cross_validation, ... ? kindly help Select the correct answer from above options...

asked Jan 22, 2022 in Education by JackTerrance

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Q: How to iterate over rows in a DataFrame in Pandas?

There is a DataFrame from pandas: import pandas as pd inp = [{'e2':20, 'e3':200}, {'e2':22,'e3':220}, { ... '] Can I do this in Pandas? Select the correct answer from above options...

asked Jan 22, 2022 in Education by JackTerrance

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Q: Remove rows with all or some NAs (missing values) in data.frame

Want to remove the lines from data frame from that : Have NAs across all columns a b c d e f 1 YASH00000206234 0 ... 0 1 2 3 2 Select the correct answer from above options...

asked Jan 22, 2022 in Education by JackTerrance

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Q: Select rows from a DataFrame based on values in a column in pandas

I want to select rows from a DataFrame based on values in some column in pandas, How can I do it? I ... WHERE column_name = some_value Select the correct answer from above options...

asked Jan 22, 2022 in Education by JackTerrance

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Q: Renaming columns in pandas

I created a dataframe and column labels in pandas and I need to edit in order to replace the original column ... names. Please help? Select the correct answer from above options...

asked Jan 22, 2022 in Education by JackTerrance

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Q: How to sum a variable by group in R?

I have a data which consists of two columns "Students" & "points" x...

asked Jan 21, 2022 in Education by JackTerrance