[rrd-users] multiple files with same datasourse

[D.J℡]

Hello every one, anybody can help me solve this problem?
I create different rrd files every day. Every rrd file has a single datasource.
When I want to Graph them in one png file, how could I  mix them together. 
I need the line and gprint functions to work normally.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.oetiker.ch/pipermail/rrd-users/attachments/20090708/6bddf57d/attachment.html