Nope, that's the way stacked bars work & why they suck ) - each color represents the total, not the space from the 0-axis point (otherwise, z-ordering gets very tricky).
(if you want to get into the whole presentation of information thing, go read Edward Tufte) Tweaking rrd usage is into arcana. There used to be a screen on the plugin where you could generate an arbitrary graph. Check this out for the types of lines you can draw: http://www.vandenbogaerdt.nl/rrdtool/tutorial/graph.php -----Burton Quotation # 88 If you hold kitty's food dish 2 feet above her head, and wave it around teasing "You want noms? You want noms?" then any injuries you receive are well-deserved. #LFMF From: [email protected] [mailto:[email protected]] On Behalf Of Gary Gatten Sent: Thursday, June 02, 2011 12:03 PM To: '[email protected]'; '[email protected]' Subject: [Ntop] changing rrd's graphing style? First, please let's not get into a debate on which way is better and what not. I broached this topic several years ago, and now the graphs are tricking me again so I REALLY want to change it. Here's the deal. I'm looking at an RRD graph of: graph image Looking at this graph, would one not assume that between 13:30 and 13:35 Egress traffic was 120+KB/Sec? Ah, but it Is not. Perhaps even more importantly - look at the sample between 13:45 and 13:50. Even IF you adjust to this "stacking" approach, would you not assume that Ingress and Egress we're roughly equal during that period? Ah, but again they are not! Ingress is say 45KB while Egress is a mere 17KB. This is far too misleading, thus I wish to change it. I would like a more "typical" (for me) graph, where data is overlayed on one another. Such that, in the graph above: in the period 13:30-13:35; Egress would be roughly 121KB/s and Ingress would be roughly 107KB/s. My questions are: 1.) Would these changed need to be made in the ntop code, the rrd .. "settings", or both? 2.) Has anyone done this before and would care to share? Thanks! Gary "This email is intended to be reviewed by only the intended recipient and may contain information that is privileged and/or confidential. If you are not the intended recipient, you are hereby notified that any review, use, dissemination, disclosure or copying of this email and its attachments, if any, is strictly prohibited. If you have received this email in error, please immediately notify the sender by return email and delete this email from your system."
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