Hello
I am discovering R and I find it is really very powerful.
However, I find some newbie difficulties.
Here, I have a data frame with manu values that I want to calculate the
frequency (the nomber of line) of the some criteria.
For exemple here, I want it to print the number of occurence where
sci[,2]=0 and sci[,1]=L. In my exemple, he is printing the number of the
line in the result data frame.
however, I have at least 90 line with sci[,2]=0 and sci[,1]=L.
Thank you in advance for any input.
> aggregate(sci[,5],list(sci[,2],sci[,1]),frequency)
Group.1 Group.2 x
1 0.0 L 1
2 0.2 L 1
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