purrr

问题 I have a data frame like so: df <- structure(list(A = c("3 of 5", "1 of 2", "1 of 3", "1 of 3", "3 of 4", "2 of 7"), B = c("2 of 2", "2 of 4", "0 of 1", "0 of 0", "0 of 0", "0 of 0"), C = c("10 of 21", "3 of 14", "11 of 34", "10 of 35", "16 of 53", "17 of 62"), D = c("0 of 0", "0 of 0", "0 of 0", "0 of 0", "0 of 0", "0 of 0"), E = c("8 of 16", "3 of 15", "10 of 32", "6 of 28", "13 of 49", "9 of 48")), class = c("tbl_df", "tbl", "data.frame"), row.names = c(NA, -6L)) df |A |B |C |D |E | |:----

问题 I have a data frame like so: df <- structure(list(A = c("3 of 5", "1 of 2", "1 of 3", "1 of 3", "3 of 4", "2 of 7"), B = c("2 of 2", "2 of 4", "0 of 1", "0 of 0", "0 of 0", "0 of 0"), C = c("10 of 21", "3 of 14", "11 of 34", "10 of 35", "16 of 53", "17 of 62"), D = c("0 of 0", "0 of 0", "0 of 0", "0 of 0", "0 of 0", "0 of 0"), E = c("8 of 16", "3 of 15", "10 of 32", "6 of 28", "13 of 49", "9 of 48")), class = c("tbl_df", "tbl", "data.frame"), row.names = c(NA, -6L)) df |A |B |C |D |E | |:----

问题 This is my transaction data. It shows the transactions made from the accounts in from column to the accounts in to column with the date and the amount information data id from to date amount <int> <fctr> <fctr> <date> <dbl> 19521 6644 6934 2005-01-01 700.0 19524 6753 8456 2005-01-01 600.0 19523 9242 9333 2005-01-01 1000.0 … … … … … 1056317 7819 7454 2010-12-31 60.2 1056318 6164 7497 2010-12-31 107.5 1056319 7533 7492 2010-12-31 164.1 I want to calculate how much transaction amount the

问题 This is my transaction data. It shows the transactions made from the accounts in from column to the accounts in to column with the date and the amount information data id from to date amount <int> <fctr> <fctr> <date> <dbl> 19521 6644 6934 2005-01-01 700.0 19524 6753 8456 2005-01-01 600.0 19523 9242 9333 2005-01-01 1000.0 … … … … … 1056317 7819 7454 2010-12-31 60.2 1056318 6164 7497 2010-12-31 107.5 1056319 7533 7492 2010-12-31 164.1 I want to calculate how much transaction amount the

问题 This is my transaction data. It shows the transactions made from the accounts in from column to the accounts in to column with the date and the amount information data id from to date amount <int> <fctr> <fctr> <date> <dbl> 19521 6644 6934 2005-01-01 700.0 19524 6753 8456 2005-01-01 600.0 19523 9242 9333 2005-01-01 1000.0 … … … … … 1056317 7819 7454 2010-12-31 60.2 1056318 6164 7497 2010-12-31 107.5 1056319 7533 7492 2010-12-31 164.1 I want to calculate how much transaction amount the

问题 This is my transaction data. It shows the transactions made from the accounts in from column to the accounts in to column with the date and the amount information data id from to date amount <int> <fctr> <fctr> <date> <dbl> 19521 6644 6934 2005-01-01 700.0 19524 6753 8456 2005-01-01 600.0 19523 9242 9333 2005-01-01 1000.0 … … … … … 1056317 7819 7454 2010-12-31 60.2 1056318 6164 7497 2010-12-31 107.5 1056319 7533 7492 2010-12-31 164.1 I want to calculate how much transaction amount the

来源： https://stackoverflow.com/questions/58997131/mutate-with-different-cut-points-by-group

来源： https://stackoverflow.com/questions/64519938/using-mutate-with-a-stored-list-of-columns-and-procedures

来源： https://stackoverflow.com/questions/53026344/purrr-how-to-apply-recursively-a-function-n-times-over-one-value

来源： https://stackoverflow.com/questions/53026344/purrr-how-to-apply-recursively-a-function-n-times-over-one-value