Find minimum non-zero value in a column R

Question

I have this situation in R:

my_minimum <- min(my_data_frame[,my_column_number])

This returns the minimum value. What I want is the minimum non-zero value. I have seen a lot of more complicated situations where people want a vector of the non-zero minimum values but I simply want a single number, the lowest non-zero value that exists in

my_column_number

within

my_data_frame

For context, this is taking place within a for loop that iteratively plots some stuff for each column, and I need to get the non-zero minimum to add to the plot.

Mera

I take it we are to assume that there are no negative values? – Selfabuse

You could also do sort. vals <- sort(my_data_frame[, my_column_number]); vals[!!vals][1] – Velarde

Answer 1

That should do the trick.

 min(my_data_frame[my_data_frame$my_column_number>0,my_column_number])

Spud

Thanks heaps, as always the solution is obvious to the pros, still getting my head around setting limits in R – Mera

Answer 2

If you use a vector:

min(myvector[myvector > 0])

Symbolic

Answer 3

min(my_data_frame[,1][which(my_data_frame[,1]>0)])

Admissive