Hi, I am a newcomer, so I am probably asking something silly here.
So, I want to use rrdtool to manage my weather station data. I read data in 5 minute intervals, but my station only tells me the rain counter for the last hour. So the number I get is a summation of my rain counter deltas for the last 12 intervals. For instance, suppose in the last 5 hours I get the values the first line below (one char for each 5-min interval), it means that, for every 5 minutes, actual rainfall has been as in the second line. 011111244445678888889998767777765555553444335888889899987677 010000120001121000121000012000110000010100012300011010001210 Is there a way to specify that the values to store in the RRD would be calculated as: stored[now] = input[now] - input[now - 1] + stored[now - 12] Thanks a lot! MP _______________________________________________ rrd-users mailing list rrd-users@lists.oetiker.ch https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
