Hi peeps!
I have just started learning R, as part of my MSc and i am struggling a bit. so part of our practice exercise is the following question:
Use the names() command to rename the columns of Mymatr in the data frame.
When i write:
names(Mydat)[4:7] <- c("Mymatr1","Mymatr2","Mymatr3","Mymatr4")
and i keep getting an error. So i tried removing and adding names in hope that it will correct it, but no happy endings yet!
These are the messages i am receiving:
Mydat
Multof2 Language mylet X1 X2 Lessthan15
1 2 English A 1 21 TRUE
2 4 English Z 2 22 TRUE
3 6 English C 3 23 TRUE
4 8 English C 4 24 TRUE
5 10 English Q 5 25 TRUE
6 12 Greek V 1 26 TRUE
7 14 Greek C 2 27 TRUE
8 16 Greek V 3 28 FALSE
9 18 Greek W 4 29 FALSE
10 20 Greek A 5 30 FALSE
11 22 English P 1 31 FALSE
12 24 English A 2 32 FALSE
13 26 English E 3 33 FALSE
14 28 English R 4 34 FALSE
15 30 English V 5 35 FALSE
16 32 Greek J 1 36 FALSE
17 34 Greek Q 2 37 FALSE
18 36 Greek I 3 38 FALSE
19 38 Greek W 4 39 FALSE
20 40 Greek V 5 40 FALSE
names(Mydat)[4:7] <- c("Mymatr1","Mymatr2","Mymatr3","Mymatr4","Mymatr5")
Error in names(Mydat)[4:7] <- c("Mymatr1", "Mymatr2", "Mymatr3", "Mymatr4", :
'names' attribute [7] must be the same length as the vector [6]
In addition: Warning message:
In names(Mydat)[4:7] <- c("Mymatr1", "Mymatr2", "Mymatr3", "Mymatr4", :
number of items to replace is not a multiple of replacement length
names(Mydat)[4:7] <- c("Mymatr1","Mymatr2","Mymatr3","Mymatr4","Mymatr5","Mymatr6","Mymatr7")
Error in names(Mydat)[4:7] <- c("Mymatr1", "Mymatr2", "Mymatr3", "Mymatr4", :
'names' attribute [7] must be the same length as the vector [6]
In addition: Warning message:
In names(Mydat)[4:7] <- c("Mymatr1", "Mymatr2", "Mymatr3", "Mymatr4", :
number of items to replace is not a multiple of replacement length
Mydat
Multof2 Language mylet X1 X2 Lessthan15
1 2 English A 1 21 TRUE
2 4 English Z 2 22 TRUE
3 6 English C 3 23 TRUE
4 8 English C 4 24 TRUE
5 10 English Q 5 25 TRUE
6 12 Greek V 1 26 TRUE
7 14 Greek C 2 27 TRUE
8 16 Greek V 3 28 FALSE
9 18 Greek W 4 29 FALSE
10 20 Greek A 5 30 FALSE
11 22 English P 1 31 FALSE
12 24 English A 2 32 FALSE
13 26 English E 3 33 FALSE
14 28 English R 4 34 FALSE
15 30 English V 5 35 FALSE
16 32 Greek J 1 36 FALSE
17 34 Greek Q 2 37 FALSE
18 36 Greek I 3 38 FALSE
19 38 Greek W 4 39 FALSE
20 40 Greek V 5 40 FALSE
names(Mydat)
[1] "Multof2" "Language" "mylet" "X1" "X2" "Lessthan15"
names
function (x) .Primitive("names")
names(Mydat)[4:7] <- c("Mymatr1","Mymatr2","Mymatr3","Mymatr4","Mymatr5","Mymatr6","Mymatr7")
Error in names(Mydat)[4:7] <- c("Mymatr1", "Mymatr2", "Mymatr3", "Mymatr4", :
'names' attribute [7] must be the same length as the vector [6]
In addition: Warning message:
In names(Mydat)[4:7] <- c("Mymatr1", "Mymatr2", "Mymatr3", "Mymatr4", :
number of items to replace is not a multiple of replacement length
names(Mydat)[4:7] <- c("Mymatr1","Mymatr2","Mymatr3","Mymatr4",)
Error in c("Mymatr1", "Mymatr2", "Mymatr3", "Mymatr4", ) :
argument 5 is empty
Please, enlighten me with what i am doing wrong!
Thnx