Hello All,
Let's say I have points on a x-y plane. x ranges from 0-2 and y from 0-2.
There are points in quadrants x[0:1]---y[0:1] and in x[1:2]----y[1:2]. I
would like to get the mean and std of the points in the x[0:1]----y[0:1]
quadrant alone. Is there a straight forward way to do it?

I asked a similar question a few days ago regarding plotting a subset of
data using conditions. The solution was:
http://r.789695.n4.nabble.com/Conditional-plot-length-in-R-td3503855.html

Thank you,
Why-so-serious.

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