Dear R experts,
I would like to substitute the values of a vector, say A, with the average
values taken over a factor
For example, lets assume
A
[1] 1 2 3 4 5 6 7 8 9 10
B
[1] 1 2 2 4 4 4 7 7 7 7
Levels: 1 2 4 7
I need to have
1.0 2.5 2.5 5.0 5.0 5.0 8.5 8.5 8.5 8.5 8.5
Thank you
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