[R] Using factors to analyze table by quantiles

Alexander Predeus predeus at gmail.com
Sun Nov 16 08:53:28 CET 2014

Hello all,

I've been trying to do the following analysis. I have a table (T1) that
defines sizes of my datasets (~80k rows):

X1   1000
X2   8323
X3   58

And then I have a table (T2) of ~ 5 million significant overlaps between

X234   X443
X323   X1
X998   X12

What I want to do, is split table T1 into 10 quantiles by "size", which I
seem to successfully achieve using these commands:

qq <- factor(cut(T1$size,quantile(T1$size,
probs=seq(0.0,1.0,by=0.1)),include.lowest = TRUE),labels = LETTERS[1:10])

  A    B    C    D    E    F    G    H    I    J
8204 7643 7941 7878 7867 7773 7913 7856 7894 7869

Now I need to count how many of all 100 possible combinations
(AA,AB,AC,etc) are present in table T2 using these factors.

How can I do that? Thank you in advance,

-- Alex

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