作者Sampregi (handle my dream)
看板Statistics
標題[問題] R的計算問題
時間Tue Dec 30 21:35:05 2008
假設有個文字檔
type.txt
[,1] [,2] [,3] [,4] [,5]
[1,] A B A B A
[2,] B B A A A
[3,] B A A B B
[4,] B B B A A
[5,] A A A A B
height.txt
[,1] [,2] [,3] [,4] [,5]
[1,] 162 152 162 152 161
[2,] 166 164 159 160 163
[3,] 163 172 175 165 157
[4,] 162 162 172 173 169
[5,] 159 166 169 174 163
weight.txt
[,1] [,2] [,3] [,4] [,5]
[1,] 45 50 52 49 54
[2,] 50 52 54 46 62
[3,] 47 51 53 52 58
[4,] 58 54 56 52 49
[5,] 47 43 56 55 52
首先type.txt表示有A和B兩種類型的人
而我想根據type.txt挑出A種類的人然後計算她們的BMI值
請問我要怎麼從type.txt挑出A種類..
然後對應到heigh.txt和weight.txt取去對應的值做計算??
謝謝...
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1F：推 bugle:height[type="A"] ; weight[type="A"] 12/30 22:30
2F：推 KnightX: == == 幫樓上修正一下 :P 12/30 22:47