Hi,
I have a problem sorting and selecting entries within a data-frame and
I don't know if it is possible to solve it with R ... (probably yes,
but I have no idea how).
Following Data;
row1 row2
a 12
pos NA
a 3
neg NA
a 5
neg NA
a 11
pos NA
I want to extract the values in row 2 in the lines with an "a" in row1.
But I want to have two vectors: vector x with all a-values (in row2)
when the label in the next line is "pos"
and vector y with all a-values when the label in the next line is "neg".
So:
x = 12, 11
y = 4, 5
How can I do that? How can I refer to values of the next line?
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