[R] Finding cases in one subset that are closet to another subset

[Peter Flom]

Good afternoon

Running R2.10.0 on Windows

I have a data frame that includes (among much else) a factor (In_2006) and a continuous variable (math_3_4).  I would like to find the 2 cases for In_2006 = 0 that are closest to each case where In_2006 = 1.

My data looks like

     In_2006 math_3_4
         0     55.1
         1     51.6
         1     18.1
         1     26.6
         1     14.1
         1      9.6
         1     48.9
         1     12.9
         0     63.0
         0     51.8

etc. for several hundred rows.

I would like a new data frame that has all the cases where In_2006 = 1, and those cases of In_2006 that are closest to those cases

Thanks in advance

Peter

Peter L. Flom, PhD
Statistical Consultant
Website: www DOT peterflomconsulting DOT com
Writing; http://www.associatedcontent.com/user/582880/peter_flom.html
Twitter:   @peterflom