All, thanks for the hints. I have been able to figure it out. There was a line I had to remove which was responsible for the "shadow" underneath the line. Thanks,
Christian Am 12.05.2014 00:04, schrieb Steve Shipway: >> /usr/bin/rrdtool grap - --width=500 --height=100 --start 139979062 > --vertical- >> label "" --title "lab_e102 / Check lab temperature" --alt-autoscale >> >> However, the lower limit on the y-axis will never be adjusted and always >> remain zero in the plot. > > The graph you attach appears to show a Y-axis lower limit of less than zero > (see the gap at the bottom). Maybe something like -1. The autoscale is > clearly starting around the data value, but something is expanding it down > to -1 or thereabouts. Unless you can supply us with the complete RRDTool > graph command line for comparison it makes it very difficult to identify the > reason -- possibly you have an additional line on the graph or something > we're not aware of. > >> /usr/bin/rrdtool grap - --width=500 --height=100 --start 139979062 > --vertical- >> label "" --title "lab_e102 / Check lab temperature" -l 21.0 -r >> >> will give me a scale that starts at 21.0 Celsius as expected. What am I > missing >> here? I am attaching a picture of the graph generated with > --alt-autoscale, >> but I am not sure it will make it to the list. The plot has values for min > and >> max included, and they are correct, so --alt-autoscale should work. > Thanks, > > In this example, you force a lower limit of 21 and use -r (rigid) to lock it > from expanding, so you get what you asked for (though it is hardcoded and > not automatically adjusted). The upper limit will still expand to whatever > your data maximum is. > > If you omit the -r, do you get a graph like you want, or does it go back to > zero or less? If the former, it might indicate a problem in the > alt-autoscale code, but I would expect you'd get the latter indicating that > it is the autoexpansion of the Y-range caused by some additional graph lines > or data that you have not shown. > > Steve > > Steve Shipway > [email protected] > _______________________________________________ rrd-users mailing list [email protected] https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
