Example using a R default data matcars.
library(MatchIt)
m.out0<-matchit(data=mtcars,am~hp+drat,exact=c("vs"),method="nearest", ratio=1, m.order="random", caliper=0.25)
m.out0
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Example using a R default data matcars.
library(MatchIt)
m.out0<-matchit(data=mtcars,am~hp+drat,exact=c("vs"),method="nearest", ratio=1, m.order="random", caliper=0.25)
m.out0