[R] local average

From: Jens Hainmueller <jens_hainmueller_at_ksg05.harvard.edu>
Date: Thu 21 Apr 2005 - 13:43:41 EST


Hello,

probably this isn't hard, but I can't get R to do this. Thanks for your help!

Assume I have a matrix of two covariates:

n    <- 1000
Y    <- runif(n)
X    <- runif(n,min=0,max=100)
data <- cbind(Y,X)

Now, I would like to compute the local average of Y for each X interval 0-1, 1-2, 2-3, ... 99-100. In other words, I would like to obtain 100 (local) Ybars, one for each X interval with width 1.

Also, I would like to do the same but instead of local means of Y obtain local medians of Y for each X interval.

Best,
Jens



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