Dear R-listers,
I am using R 3.1, I amtrying to generate 40 patients in each treatment group
with 12 block, Equal number of treatment in each block ,using stratification
Variable age65(yes, no),surgery(yes ,no) and smoke (yes, no)
How can i creat like thislist in R.
block identifier
block size
sequence within block
treatment
age65
surgery
smoke
1
12
1
Group B
yes
yes
Yes
1
12
2
Group A
yes
yes
Yes
1
12
3
Group A
yes
yes
Yes
1
12
4
Group B
yes
yes
Yes
1
12
5
Group A
yes
yes
Yes
1
12
6
Group B
yes
yes
Yes
1
12
7
Group B
yes
yes
Yes
1
12
8
Group A
yes
yes
Yes
1
12
9
Group A
yes
yes
Yes
1
12
10
Group B
yes
yes
Yes
1
12
11
Group A
yes
yes
Yes
1
12
12
Group B
yes
yes
Yes
2
12
1
Group B
yes
yes
no
2
12
2
Group A
yes
yes
no
2
12
3
Group B
yes
yes
no
2
12
4
Group B
yes
yes
no
2
12
5
Group A
yes
yes
no
2
12
6
Group A
yes
yes
no
2
12
7
Group B
yes
yes
no
2
12
8
Group A
yes
yes
no
2
12
9
Group A
yes
yes
no
2
12
10
Group B
yes
yes
no
2
12
11
Group A
yes
yes
no
2
12
12
Group B
yes
yes
no
I am very appreciate yourtime to answer my question
Thanks
Sug
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