[julia-users] Re: Getting sequence of time and subset it

[Evan Fields]

Of course there's a way :)

You can use the isna function to check if a value is NA or not. There's 
also the dropna function which takes a DataArray as input and returns a 
regular Vector with the NA elements removed.

You could try something like the following:

firstbreakcol = 4
lastbreakcol = 5
for i in 1:nrow(sdt2), t in 
sdt2[:StartTime][i]:Dates.Minute(30):sdt2[:EndTime][i]
    shouldprint = true
    for j in firstbreakcol:lastbreakcol
        if !isna(sdt2[i,j]) && sdt2[i,j] == t
            # t is in a break column
            shouldprint = false
            break
        end
    end
    if shouldprint
        println(t)
    end
end

It's a little verbose, true. I'm sure there's something cleaner with 
dropna, filter, etc.