[R] Data transformation

[legen]

Dear all,

I have a dataset as below:

id    code1    code2         p 
 1        4        8           0.1
 1        5        7           0.9
 2        1        8           0.4
 2        6        2           0.2
 2        4        3           0.6
 3        5        6           0.7
 3        7        5           0.9

I just want to rewrite it as this (vertical to horizontal):

id   var1  var2  var3  var4  var5  var6  var7  var8 
1        0      0      0    0.1   0.9       0   0.9    0.1
2     0.4    0.2   0.6    0.6      0    0.2      0    0.4
3        0      0      0      0    0.8    0.7    0.9      0

For the third subject, there are two values being equal to 5 in code1 and
code2, but different values in p:  0.7 and 0.9, so I assigned their average
0.8 in var5.

Does anybody can help me to handle this? Many thanks for your consideration
and time.

Legen 

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