四半期の頻度を持つ文字から時間変数を変換する

Question

私は四半期周波数と3つの時間変数を持つデータフレームを持っています。時間はです。私は時系列変数として時間を設定し、NAME1（アルファベット順）、名2（アルファベット順）、および時間（時系列）でデータフレームを並べ替えたい

dt <- structure(list(
    name1   = c("C","C","C","C","C","C","B","B","B","B","B","B"), 
    name2   = c("D","E","A","D","E","A","D","E","A","D","E","A"), 
    year   = c(2012, 2012, 2012, 2010, 2010, 2010, 2012, 2012, 2012, 2010, 2010, 2010), 
    quarter  = c(4,4,4,1,1,1,4,4,4,1,1,1), 
    time   = c("2012q4", "2012q4","2012q4","2010q1", "2010q1","2010q1","2012q4", "2012q4","2012q4","2010q1", "2010q1","2010q1")), 
    .Names   = c("name1","name2","year", "quarter", "time"), 
    row.names  = c("1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12"), class =("data.frame")) 

を次のようにデータフレームが見えます。希望の出力は

dt <- structure(list(
name1   = c("B","B","B","B","B","B", "C","C","C","C","C","C"), 
name2   = c("A", "A", "D", "D", "E", "E","A", "A", "D", "D", "E", "E"), 
year   = c(2010,2012,2010,2012,2010,2012,2010,2012,2010,2012,2010,2012), 
quarter  = c(1,4,1,4,1,4,1,4,1,4,1,4), 
time   = c("2010q1","2012q4", "2010q1","2012q4","2010q1","2012q4","2010q1","2012q4","2010q1","2012q4","2010q1","2012q4")), 
.Names   = c("name1","name2","year", "quarter", "time"), 
row.names  = c("1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12"), class =("data.frame")) 

でした。

dt$time <- as.yearqtr(dt$time) 
dt <- dt[order(dt$name1, dt$name2, dt$time),] 

ありがとうございます。

Answer 1

$yearと$quarterではなく$timeを使用するのはなぜですか？

ちょうどdplyr::arrange(dt, name1, name2, year, quarter)です。