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# Untitled

a guest May 16th, 2018 102 Never
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1. A   B   C
2. 1   5   4.25    4.5
3. 2   3.5 4   2.5
4. 3   3.25    4   4
5. 4   4.25    4.5 2.25
6. 5   1.5 4.5 3
7.
8. > c(a=5, b=4.25, c=4.5)
9.   a   b   c
10. 5.0 4.25 4.5
11.
12. x[r,]
13.
15. x<-structure(list(A = c(5, 3.5, 3.25, 4.25, 1.5), B = c(4.25, 4,
16. 4, 4.5, 4.5), C = c(4.5, 2.5, 4, 2.25, 3)), .Names = c("A", "B",
17. "C"), class = "data.frame", row.names = c(NA, -5L))
18.
19. #The vector your result should match
20. y<-c(A=5, B=4.25, C=4.5)
21.
22. #Test that the items in the row match the vector you wanted
23. x[1,]==y
24.
25. > d <- data.frame(a=1:3, b=4:6, c=7:9)
26.
27. > d
28.   a b c
29. 1 1 4 7
30. 2 2 5 8
31. 3 3 6 9
32.
33. > d[1, ]
34.   a b c
35. 1 1 4 7
36.
37. > d[1, ]['a']
38.   a
39. 1 1
40.
41. x<-structure(list(A = c(5, 3.5, 3.25, 4.25, 1.5), B = c(4.25, 4,
42. 4, 4.5, 4.5), C = c(4.5, 2.5, 4, 2.25, 3)), .Names = c("A", "B",
43. "C"), class = "data.frame", row.names = c(NA, -5L))
44. subset(x, A ==5 & b==4.25 && c==4.5)
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