WebNov 1, 2024 · You can simply write: df = df [ ['bob']] and the other columns will be garbage collected. Share. Improve this answer. Follow. answered Sep 28, 2013 at 2:40. Andy Hayden. 352k 100 618 529. Web1 day ago · So this tells us that, unlike in the case of list, when assigning to a column of a data.frame we also have to make sure that the length of assignment matches the number of rows in the data.frame. This is because a data.frame is a special kind of list - a list where all elements have the same length so it could be arranged into a table format.
How to delete all columns in DataFrame except certain ones?
WebNov 28, 2024 · If you wanted to just summarise all but one column you could do. but in this case you have to check if it's numeric also. factors are technically numeric, so if you want to exclude non-numeric columns and factors, replace sapply (df, is.numeric) with sapply (df, function (x) is.numeric (x) & !is.factor (x)) WebMay 16, 2024 · Alternate output format for psql showing one column per line with column name. 1328. Create a Pandas Dataframe by appending one row at a time. 1774. How do I get the row count of a Pandas DataFrame? 960. Deleting DataFrame row in Pandas based on column value. 554. Convert Python dict into a dataframe. 1320. northern colorado bad credit rentals
Select everything but a list of columns from pandas dataframe
WebBy using the R base function subset () you can select columns except specific columns from the data frame. This function takes the data frame object as an argument and the columns you wanted to remove. #using subset df2 <- subset ( df, select = - c ( id, name, chapters)) df2. Yields the same output as above. 6. WebApr 14, 2024 · Everything To Know About OnePlus. Gadget. Create Device Mockups in Browser with DeviceMock. 5 Key to Expect Future Smartphones. Everything To Know About OnePlus. How to Unlock macOS Watch Series 4. Surface Studio vs iMac – Which Should You Pick? 5 Ways to Connect Wireless Headphones to TV. WebMay 25, 2024 · We can use df.columns.difference (set nomenclature) to select "all but one column", subset the frame, and apply the operation:. bad_column = "undesired_column" other_cols = df.columns.difference([bad_column]) df[other_cols] = df[other_cols].apply(...) Note that we need to pass an array-like to .difference; it won't accept bad_column string … how to ring a libman mop