Thank you so much, Marc and Phil. Unfortunenately, I misunderstood the problem
myself and wasn't clear how i wanted the variables to be. I will describe the
issue again and hope you can help me out.
Here is part of data called layout
Id Name block col row
1 a 1 1 1
2 b 1 2 1
3 c 1 3 1
4 a 1 4 1
5 b 1 1 2
6 c 1 2 2
7 b 1 3 2
8 c 1 4 2
9 d 1 1 3
10 e 1 2 3
11 a 1 3 3
12 d 1 4 3
13 e 1 1 4
14 a 1 2 4
15 d 1 3 4
16 c 1 4 4
17 d 2 1 1
18 c 2 2 1
19 e 2 3 1
20 d 2 4 1
21 b 2 1 2
22 e 2 2 2
23 f 2 3 2
24 d 2 4 2
32 a 2 4 4 and so on
. . . . .
. . . . .
. . . . .
768 f 48 4 4
As you can see for each row there are 4 columns. the total observations in
each block is 16. My real data contains 48 blocks which give totally 768
observations. The blocks ranged from 1-48 are displayed four and four after
each other like below.
Note there are 4 rows and 4 columns in each block.
1 2 3 4
> 5 6 7 8
> 9 10 11 12
> 13 14 15 16
> 17 18 19 20
> 21 22 23 24
> 25 26 27 28
> 29 30 31 32
> 33 34 35 36
> 37 38 39 40
> 41 42 43 44
> 45 46 47 48
What I want is to create two variables called blockrow respective blockcol in
such a way that blockrow
> will have value 1 for block 1,2 3 and 4, blockrow=2 for blocks 5,6,7
> and 8 and so on. Similarly, blockcol = 1 for blocks
> 1,5 ,9,13,17,21,25,29,33,37,41 and 44 and so on. As you can see there
> are 12 blockrows and 4 blockcols. The data should look like
Id Name block col row blockrow blockcol
1 a 1 1 1 1 1
2 b 1 2 1 1 1
3 c 1 3 1 1 1
4 a 1 4 1 1 1
5 b 1 1 2 1 1
6 c 1 2 2 1 1
7 b 1 3 2 1 1
8 c 1 4 2 1 1
9 d 1 1 3 1 1
10 e 1 2 3 1 1
11 a 1 3 3 1 1
12 d 1 4 3 1 1
13 e 1 1 4 1 1
14 a 1 2 4 1 1
15 d 1 3 4 1 1
16 c 1 4 4 1 1
17 d 2 1 1 1 2
18 c 2 2 1 1 2
19 e 2 3 1 1 2
20 d 2 4 1 1 2
21 b 2 1 2 1 2
22 e 2 2 2 1 2
23 f 2 3 2 1 2
24 d 2 4 2 1 2
32 a 2 4 4 and so on
. . . . .
. . . . .
. . . . .
768 f 48 4 4 12 4
I have an algorithm
blockrow <-1
if(layout$block <= 4)
blockrow <-1
if(5<=layout$block <= 8)
blockrow <-2
if(9<=layout$block <= 12)
blockrow <-3 and so on
Can I do a for loop like :
#---------- Append some more columns to matrix layout----------------------
blockrow<-rep(0,nrow(layout))
blockcol<-rep(0,nrow(layout))
for (a in 1:12){
if(4*a+1<=layout$block<=(a+1)*4)
blockrow<-(a+1)
}
Similarly,
blockcol<-1
if(layout$block = 5,9,13,17,21,25,29,33,37,41,45)
blockcol<-1
if(layout$block = 2,6,10,14,18,22,26,30,34,38,42,46)
blockcol<-2 and so on
which give the for loop
blockcol<-1
for (a in 1:12){
if(layout$block==(4*a+1))
blockrow<-1
}
or how can i do it in R so I get blockrow and blockcol as i want ?
Thanks again for your help,
Best regards,
Yen
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