这是非常基本的，但我现在已经坚持了一段时间。
我想从数据集hitters.txt 中移除观察 > dput(hitters[280:290,])
structure(list(AtBat = c(439L, 453L, 528L, 633L, 16L, 562L, 281L,
593L, 687L, 368L, 263L), Hits = c(96L, 103L, 122L, 210L, 2L,
169L, 76L, 152L, 213L, 103L, 70L), HmRun = c(0L, 8L, 1L, 6L,
0L, 17L, 3L, 23L, 10L, 3L, 1L), Runs = c(44L, 53L, 67L, 91L,
1L, 88L, 42L, 69L, 91L, 48L, 26L), RBI = c(36L, 33L, 45L, 56L,
0L, 73L, 25L, 75L, 65L, 28L, 23L), Walks = c(65L, 52L, 51L, 59L,
0L, 53L, 20L, 53L, 27L, 54L, 30L), Years = c(4L, 2L, 4L, 6L,
2L, 8L, 8L, 6L, 4L, 8L, 4L), CAtBat = c(711L, 507L, 1716L, 3070L,
28L, 3181L, 2658L, 2765L, 1518L, 1897L, 888L), CHits = c(148L,
123L, 403L, 872L, 4L, 841L, 657L, 686L, 448L, 493L, 220L), CHmRun = c(1L,
8L, 12L, 19L, 0L, 61L, 48L, 133L, 15L, 9L, 9L), CRuns = c(68L,
63L, 211L, 420L, 1L, 450L, 324L, 369L, 196L, 207L, 83L), CRBI = c(56L,
39L, 146L, 230L, 0L, 342L, 300L, 384L, 137L, 162L, 82L), CWalks = c(99L,
58L, 155L, 274L, 0L, 373L, 179L, 321L, 89L, 198L, 86L), League = structure(c(2L,
1L, 1L, 2L, 1L, 1L, 1L, 1L, 1L, 2L, 2L), .Label = c("A", "N"), class = "factor"),
Division = structure(c(1L, 2L, 2L, 2L, 1L, 1L, 1L, 2L, 1L,
2L, 1L), .Label = c("E", "W"), class = "factor"), PutOuts = c(229L,
289L, 209L, 367L, 247L, 351L, 106L, 315L, 294L, 209L, 81L
), Assists = c(406L, 407L, 372L, 432L, 4L, 442L, 144L, 10L,
445L, 246L, 147L), Errors = c(22L, 6L, 17L, 16L, 8L, 17L,
7L, 6L, 13L, 3L, 4L), Salary = c(150, 105, 350, 90, NA, 530,
341.667, 940, 350, 326.667, 250), NewLeague = structure(c(2L,
1L, 1L, 2L, 1L, 1L, 1L, 1L, 1L, 2L, 2L), .Label = c("A",
"N"), class = "factor")), .Names = c("AtBat", "Hits", "HmRun",
"Runs", "RBI", "Walks", "Years", "CAtBat", "CHits", "CHmRun",
"CRuns", "CRBI", "CWalks", "League", "Division", "PutOuts", "Assists",
"Errors", "Salary", "NewLeague"), row.names = c("-Steve Jeltz",
"-Steve Lombardozzi", "-Spike Owen", "-Steve Sax", "-Tony Armas",
"-Tony Bernazard", "-Tom Brookens", "-Tom Brunansky", "-Tony Fernandez",
"-Tim Flannery", "-Tom Foley"), class = "data.frame")
：
hitters <- hitters[!hitters$Colname == "-Steve Sax",]
如果我知道我将使用的第一列的名称：
hitters <- hitters[hitters$AtBat != "-Steve Sax", ]
或
read.table("hitters.txt", head = F)但我不知道第一栏的名称：
。我试过了： read.table("hitters.txt", head = F)
`和
head = T我的问题是：
答案 0 :(得分：1)
第一个＆＃34;列＆＃34;表示行名称（这不是数据集中的实际列，但在输出中显示如此）。您可以使用函数rownames：
hitters[!rownames(hitters) %in% '-Steve Sax', ]
将从数据集中提取观察结果。
输出：
AtBat Hits HmRun Runs RBI Walks Years CAtBat CHits CHmRun CRuns
-Steve Jeltz 439 96 0 44 36 65 4 711 148 1 68
-Steve Lombardozzi 453 103 8 53 33 52 2 507 123 8 63
-Spike Owen 528 122 1 67 45 51 4 1716 403 12 211
-Tony Armas 16 2 0 1 0 0 2 28 4 0 1
-Tony Bernazard 562 169 17 88 73 53 8 3181 841 61 450
-Tom Brookens 281 76 3 42 25 20 8 2658 657 48 324
-Tom Brunansky 593 152 23 69 75 53 6 2765 686 133 369
-Tony Fernandez 687 213 10 91 65 27 4 1518 448 15 196
-Tim Flannery 368 103 3 48 28 54 8 1897 493 9 207
-Tom Foley 263 70 1 26 23 30 4 888 220 9 83