tidyr code snippets in r

calculate the mean by group with missing data in r

change the order of columns in r

divide alternating rows in table in r

divide value in a tabble based on side column in r

isolate most common in r

pivot a dataset in r

pivot longer one column in data frame in r

plot when years are columns in r

remove mutltiple columns from a df in r

remove a column in a df with a special name in r

select all the ol in a df exept the last 2 in r

summarize list of variables by group in r

transpose a dataframe according to a specific column in r

use pivot_wider to change two columns with values to wide format and keep others in long format in r in r