Ragia Ibrahim [Mon, Nov 30, 2015 at 04:55:08AM CET]:
Dear group,
kindly, I have a data frame, as follows:
Measure_id i j value rank
I want to select distinct rows based on two coulmn ( Measure_id and i )
I didn't get your example code to run but the following works for me:
dfr <-
A logical expression applied to a vector (such as a dataframe column) gives you
a logical vector that you can use for selection. You can combine several of
these with the & (AND) and | (OR) operator. In your case, you apparently want a
range of possible values. Use the %in% operator.
Consider e
Dear group,
kindly, I have a data frame, as follows:
Measure_id i j value rank
1 1 2 3 2.0 1.000
2 1 5 1 2.0 1.000
3 1 2 1 1.5 0.750
4 1 5 2 1.5 0.750
5 1 7 3 1.5 1.000
6 1 2 4 1.0 0.500
7
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