Merge-rrd

[manel]

Hi,
I need merge two rrd files. I find some scripts like
http://www.lemski.pl/doku.php/progs:merge-rrd.pl
https://gist.github.com/2166343
http://oss.oetiker.ch/rrdtool/pub/contrib/merge-rrd.tgz

Do you know any script merge rrd that work correctly

Thanks