randomization [R for BE/BA]

posted by Ana Cristina – Brazil, 2018-02-23 21:33  – Posting: # 18453
Views: 6,185

For example:
I have 16 subjects and two sequences (TR and RT) and of these 16 subjects:
8 are female (4 in the TR sequence and 4 in the RT sequence)
8 are male (4 in the TR sequence and 4 in the RT sequence)

I would like to know if anyone has the formula to do in R the balanced randomization by sex and sequence as in this example.
I need something general similar to this example and that generates a seed.

sujeito sexo seq period 1 period 2
1 F 1 T R
2 M 2 R T
3 M 1 T R
4 M 2 R T
5 F 1 T R
6 F 2 R T
7 M 2 R T
8 M 1 T R
9 M 1 T R
10 M 2 R T
11 F 2 R T
12 F 1 T R
13 F 2 R T
14 F 1 T R
15 M 1 T R
16 F 2 R T

thank you,

Ana Cristina


Edit: Category changed; see also this post #1. [Helmut]

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