一列中的R

Question

排序表我有這個表：

head(tb) 
    shot_made_flag 
opponent  0  1 
    ATL 54.79452 45.20548 
    BKN 60.00000 40.00000 
    BOS 58.87612 41.12388 
    CHA 56.40000 43.60000 
    CHI 56.97674 43.02326 
    CLE 56.03113 43.96887 

這是我的代碼：

table(opponent,shot_made_flag) 
rowSums(table(opponent,shot_made_flag)) 
b<table(opponent,shot_made_flag)/rowSums(table(opponent,shot_made_flag))*100 
head(tb) 

，我想我的表由值在第1列進行排序，但我從來沒有拿回表格。如果你想在上升的Result我只得到了價值在月牙排序列1（或變小的順序）

Answer 1

使用order功能和列前-（減號）進行降序排列，並沒有減號訂購。

df <- read.table(header=T, text=" 
    opponent  0  1 
    ATL 54.79452 45.20548 
    BKN 60.00000 40.00000 
    BOS 58.87612 41.12388 
    CHA 56.40000 43.60000 
    CHI 56.97674 43.02326 
    CLE 56.03113 43.96887 
    ",check.names=F) 

    df 
    # opponent  0  1 
    # 1  ATL 54.79452 45.20548 
    # 2  BKN 60.00000 40.00000 
    # 3  BOS 58.87612 41.12388 
    # 4  CHA 56.40000 43.60000 
    # 5  CHI 56.97674 43.02326 
    # 6  CLE 56.03113 43.96887 

    names(df) 
    # [1] "opponent" "0"  "1"  

    Result <- df[order(-df$"1"),] 
    Result 
    # opponent  0  1 
    # 1  ATL 54.79452 45.20548 
    # 6  CLE 56.03113 43.96887 
    # 4  CHA 56.40000 43.60000 
    # 5  CHI 56.97674 43.02326 
    # 3  BOS 58.87612 41.12388 
    # 2  BKN 60.00000 40.00000 

    # Alternative 
    Result <- df[order(-df[,3]),] 
    Result 
    # opponent  0  1 
    # 1  ATL 54.79452 45.20548 
    # 6  CLE 56.03113 43.96887 
    # 4  CHA 56.40000 43.60000 
    # 5  CHI 56.97674 43.02326 
    # 3  BOS 58.87612 41.12388 
    # 2  BKN 60.00000 40.00000