Lennyy questions

Lennyy answers

• R - Shifting cells/Insert NA if previous cell contains string pattern
• R add vector content to data frame index
• How do I create the sequence 1 12 123
• If/else function on a data frame to create conditional matrix
• ggplot2 Stacked Bar Chart - Each Bar being 100% and with percenage labels inside each bar
• Replacing zeroes with NA for values preceding non-zero
• Select all rows which are duplicates except for one column
• Get values from a column where a threshold is crossed for the first time for each group in R
• Select highest values in a dataframe by group
• What is the difference between paste/paste0 and str_c?