hi dear R users,
I'm a newbie with R and excuse me if my question is stupid ... but i've read
lot of documentation and I don't know how to do.
I have a dataset like
x y var1 var2
2 4 10 50
3 3 20 70
3 2 50 68
4 5 34 42
5 3 10 23
7 8 23 42
7 3 23 34
[...]
And I need to produce grids like :
y\x ]0-2] ]2-4] ]4-6] ]6-8]
]0-3]
]3-6] means of corresponding values for var1 (or var2)
]6-9]
but I don't find any example ....
in advance, lot of thanks for your help
js
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