clear
local nvars = 10
set obs 5000
forvalues i=1/`nvars' {
	generate x`i' = rnormal()
	}
	
forvalues i=1/`nvars' {
	egen y`i' = rowmin(x*)
	forvalues j=1/`nvars' {
		quietly replace x`j' = . if x`j' == y`i'
		}
	}
drop x*
	
summarize y*