Andre Wildberg questions

Andre Wildberg answers

• Check if element of one dataframe is in another dataframe, within group
• combine two columns while using read_table
• Use dplyr complete() to create new variable based on min/max values [duplicate]
• Filter list of dataframe according to the mean of one column in R
• Base R grep-family is much faster than `stringr` variants when dealing with factors
• R: Get proportions of values in nested list and store in data frame
• Replacing predefined values in R
• Formatting a duration as HH:mm:ss in R [duplicate]
• How to identify and merge connected cases in a list of integer vectors
• Replace NA values in a data frame with the mean values of a variable depending on the rank of another variable