どのように各係数に等しい行数を動的に取得するのですか？

Question

変数を使用してデータフレームの行にアクセスするにはどうすればよいですか？私がデータフレームteを持っていて、列のすべての行を取得したいのですが、それらにアクセスするために変数を使用する必要があります。どのようにすればいいですか？

structure(list(SHOP_DATE = c(20060410L, 20060410L, 20060411L, 20060415L, 20060413L, 20060415L, 20060414L, 20060413L, 20060416L, 20060414L, 20060413L, 20060415L, 20060416L, 20060413L, 20060415L, 20060411L, 20060416L, 20060415L, 20060411L, 20060410L), SHOP_WEEKDAY = c(2L, 2L, 3L, 7L, 5L, 7L, 6L, 5L, 1L, 6L, 5L, 7L, 1L, 5L, 7L, 3L, 1L, 7L, 3L, 2L), SHOP_HOUR = c(14L, 13L, 13L, 8L, 14L, 10L, 13L, 13L, 12L, 15L, 15L, 13L, 15L, 18L, 11L, 11L, 15L, 14L, 17L, 20L), QUANTITY = c(28L, 2L, 1L, 26L, 14L, 16L, 6L, 6L, 4L, 3L, 8L, 3L, 6L, 1L, 4L, 2L, 7L, 3L, 9L, 2L), SPEND = c(38.83, 1.9, 0.85, 35.71, 4.02, 18.09, 5.43, 12.09, 7.94, 2.37, 18.13, 3.7, 7.27, 0.67, 1.69, 1.6, 6.73, 1.9, 7.74, 0.84), PROD_CODE = c(70, 590, 231, 81, 587, 887, 894, 405, 677, 635, 93, 433, 81, 528, 289, 935, 680, 471, 471, 254), PROD_CODE_10 = c(163, 171, 1, 130, 196, 70, 160, 34, 16, 82, 52, 22, 130, 84, 68, 160, 152, 195, 195, 85), PROD_CODE_20 = c(10, 14, 1, 70, 28, 49, 10, 40, 35, 53, 43, 36, 70, 54, 34, 10, 7, 28, 28, 54), PROD_CODE_30 = c(26, 27, 1, 23, 3, 11, 26, 7, 5, 13, 8, 5, 23, 14, 22, 26, 26, 3, 3, 14), PROD_CODE_40 = c(2, 2, 1, 2, 3, 5, 2, 3, 3, 5, 3, 3, 2, 5, 1, 2, 2, 3, 3, 5), CUST_CODE = c(1, 1, 650, 761, 872, 983, 1094, 1094, 1205, 1316, 1316, 1316, 1316, 1316, 1427, 1427, 2, 113, 113, 224), CUST_PRICE_SENSITIVITY = c(1, 1, 2, 2, 1, 3, 2, 2, 2, 1, 1, 1, 1, 1, 3, 3, 1, 3, 3, 1), CUST_LIFESTAGE = c(3, 3, 1, 3, 4, 1, 1, 1, 3, 3, 3, 3, 3, 3, 3, 3, 1, 5, 5, 2), BASKET_ID = c(1, 1112, 1864, 1975, 2086, 2197, 2308, 2419, 2530, 2, 113, 224, 335, 446, 557, 668, 779, 890, 1001, 1113), BASKET_SIZE = c(1, 3, 3, 1, 1, 1, 2, 2, 2, 2, 2, 2, 2, 3, 2, 3, 2, 2, 2, 3), BASKET_PRICE_SENSITIVITY = c(2, 2, 2, 2, 2, 3, 2, 2, 1, 2, 2, 1, 2, 2, 1, 1, 1, 3, 3, 1), BASKET_TYPE = c(1, 2, 2, 1, 3, 1, 2, 2, 2, 2, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2), BASKET_DOMINANT_MISSION = c(1, 1, 1, 1, 1, 3, 3, 3, 2, 1, 1, 2, 1, 4, 1, 3, 1, 2, 1, 3), STORE_CODE = c(278, 278, 11, 169, 533, 271, 185, 185, 333, 358, 358, 358, 358, 358, 432, 355, 528, 22, 22, 96), STORE_FORMAT = c(1, 1, 2, 1, 3, 1, 2, 2, 1, 1, 1, 1, 1, 1, 4, 1, 1, 2, 2, 4), STORE_REGION = c(5, 5, 9, 3, 7, 3, 2, 2, 10, 5, 5, 5, 5, 5, 2, 6, 4, 11, 11, 9)), .Names = c("SHOP_DATE", "SHOP_WEEKDAY", "SHOP_HOUR", "QUANTITY", "SPEND", "PROD_CODE", "PROD_CODE_10", "PROD_CODE_20", "PROD_CODE_30", "PROD_CODE_40", "CUST_CODE", "CUST_PRICE_SENSITIVITY", "CUST_LIFESTAGE", "BASKET_ID", "BASKET_SIZE", "BASKET_PRICE_SENSITIVITY", "BASKET_TYPE", "BASKET_DOMINANT_MISSION", "STORE_CODE", "STORE_FORMAT", "STORE_REGION"), na.action = structure(c(1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L, 11L, 12L, 13L, 14L, 15L, 16L, 17L, 18L, 19L, 20L, 21L, 22L, 23L, 24L, 25L, 26L, 27L, 28L, 29L, 30L, 31L, 32L, 33L, 34L, 35L, 36L, 37L, 38L, 39L, 40L, 41L, 42L, 43L, 44L, 45L, 46L, 47L, 48L, 49L, 50L, 51L, 52L, 53L, 54L, 55L, 56L, 57L, 58L, 59L, 60L, 61L, 62L, 63L, 64L, 65L, 66L, 67L, 68L, 69L, 70L, 71L, 72L, 73L, 74L, 75L, 76L, 77L, 78L, 79L, 80L, 81L, 82L, 83L, 84L, 85L, 86L, 87L, 88L, 89L, 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Answer 1

te[,target]==x 

は私の質問に直接答えですが、私が代わりにforのsapplyを使用して終了：

target<-"BASKET_SIZE" 
for(x in levels(te[target])) 
    te[target==x] 

はここteだ：私はこのような何かをしたいです。

df$Toats<-sapply[levels(te[,target]), function(x) length(te[,target]==x)] 

@GeneBurinskyが回答を投稿した場合、私はそれを受け入れます。