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2011 Sep 13
2
Selecting row indices from a data.frame by a factor and simple calculation (miniumum)
...have the minimum values for the factor. I am sure it would involve some combination of which and tapply but cannot figure it out? Many thanks, Barry Dr Barry Rawlins British Geological Survey Keyworth Nottingham NG12 5GG UK Tel: 0115 9363140 Mob: 07884235473 homepage http://sites.google.com/site/barryrawlins/ -- This message (and any attachments) is for the recipient ...{{dropped:8}}