Hi,
First of all, let me thank you all for replying so rapidly to my first question on this list. It was very very helpfull... and I'm learning R faster and faster.
I just encountered a second problem, which may also have a simple solution.
Here it is:
In my program, a vector is a set of objects.
I was looking for a way to store these sets in a big object. I chose to store them in a list.
So now I have a list of vectors which looks as follows:
[[1]] [1] "a1" "a3" "a4"
[[2]] [1] "a1" "a4" "a5"
[[3]] [1] "a1" "a5" "a6"
Then comes a crucial step where I may have to add the vector ("a3", "a1", "a4") in this list.
But as you can see, this set is already present (at position 1 of my list). So it should not be added. If I do a systematic concatenation, at the end, I have a list with too many vectors (where some elements of my list represent the same set).
So what I would like to do is a type of Union, but I can't find a way to do it. Unions work only on vectors, and not a vector and a list of vectors.
Can anyone help me with this?
I thank you very much in advance
Patrick
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