> Hi there!! Really stunning graphs!
> Could you just briefly explain how to
> get the negatives (below the line!)
Depending on what you're doing you can either store negative values in the rrd, or use RPN to multiply by a negative number in a CDEF, i.e. in the CDEF field say 'a,-1,*'. (replace a with the identifier for that line) Though in most cases I want 'a,-8,*', because the rrd is in bytes and I want to display in bits.
A put up a static copy of the edit page for a simple graph like this at:
> I've also got another Q (I'm no linux
> expert!) I'm reading the data from
> directories created by Ntop; Every now
> and then the whole drraw crashes
> (refuses to draw any graphs) because
> ""bla bla bla... is still tainted"
> That means theres a directory with "("
> or ")" or some other fuzzy character in
> the name. Any suggestions what I can do
> (Save for wiping it) to make it accept
> those paths?
Actually, I think it means that perl is running in taint mode, as it should be, and drraw isn't untainting some peice of data before using it. Sounds like a drraw bug. What version are you using, and is there a line number reference in the error message?
> It would be nice if you added
> screenshots to your site.
Check out my site at http://stats.net.cmu.edu/cgi-bin/drraw/drraw.cgi
The drraw main page has a link there already...
I keep the graph creation pages limited to authenticated users, so maybe some screen shots of that would be useful.