Dear Jonas, m.out <-matchit (treatment~x1+x2+x3+x4+x5+x6+x7+x8+x9+x10+x11+x12,data=mydata, method="nearest",exact=c("x8","x9","x12")) Best, Jeanne ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ S. Jeanne Horst, PhD Center for Assessment and Research Studies Associate Professor, Department of Graduate Psychology James Madison University 1122 Lakeview Hall; 298 Port Republic Road; MSC 6806 Harrisonburg, VA 22807 Office Phone: (540) 568-7103 http://www.psyc.jmu.edu/assessment/people/horst.html http://www.jmu.edu/assessment/ http://www.jmu.edu/learningimprovement/ "Learning to live with ambiguity is learning to live with how life really is, full of complexities and strange surprises.” James Hollis "Fall seven times, stand up eight." Japanese Proverb "Walk to the beat of your own tuba." Dove Chocolate ________________________________ From: matchit-bounces(a)lists.gking.harvard.edu &lt;matchit-bounces(a)lists.gking.harvard.edu&gt; on behalf of Jonas Geldmann &lt;jg794(a)cam.ac.uk&gt; Sent: Friday, May 19, 2017 4:34:09 AM To: matchit(a)lists.gking.harvard.edu Subject: [matchit] Different "methods" per variable Dear mailing list I have a question about the MatchIt that might be very naïve or simple, but I am very new to the package. I am matching on a series of variables some continues (e.g. temperature and elevation) and some categorical (country and landcover class). As a result, I need method = “exactly” for some variable (i.e. country) and method = “nearest”, distance = “logit” for others (i.e. temperature). I am not sure if I can specific different methods for different variables in the same matchit call Thank you in advance. Sincerely, Jonas _____________________________________________________ Postdoctoral Research Fellow Conservation Science Group Department of Zoology University of Cambridge Downing Street, Cambridge CB2 3EJ Phone: +44 7412 885 112 Danish: +45 2990 5192 Skype: jgeldmann