The Question : 338 people think this question is useful I have a pandas data frame df like: I want to group by the first column and get second column as lists in rows: Is it possible to do something like this using pandas groupby? The Question Comments : The Answer 1 484 people think

The Question : 368 people think this question is useful Basically the question is how to get from this: foo_id foo_name 1 A 1 B 2 C to this: foo_id foo_name 1 A B 2 C The Question Comments : DOWNVOTE it’s really confusing to name a column string, giving it a name that looks

The Question : 157 people think this question is useful I’m struggling a bit with the dplyr-syntax. I have a data frame with different variables and one grouping variable. Now I want to calculate the mean for each column within each group, using dplyr in R. This gives me the mean for column “a” for

The Question : 158 people think this question is useful From a data frame, is there a easy way to aggregate (sum, mean, max et c) multiple variables simultaneously? Below are some sample data: I would like to simultaneously aggregate the x1 and x2 variables from the df2 data frame by year and month. The

The Question : 175 people think this question is useful I have a data.frame and I need to calculate the mean per group (i.e. per Month, below). My desired output is like below, where the values for Rate1 and Rate2 are the group means. Please disregard the value, I have made it up for the