R: returning the minimum positive number

Question

I have a dataframe with positive and negative numbers. What I need to return is the smallest positive number. Is there a function that does this?

 dfcount  <- data.frame(A=c(1,2,3,4,-5,-6,-7))

ie minpositive(dfcount) returns 1 and not -7

Thank you for your help

Answer 1

This function would work:

minpositive = function(x) min(x[x > 0])

For example:

dfcount  <- data.frame(A=c(1,2,3,4,-5,-6,-7))
minpositive(dfcount)
# 1

Answer 2

This should work:

min(dfcount$A[dfcount$A > 0])