Hi, I suppose the other option, if I am unable to achieve what I wanted, is to only draw the trend line from the start of the actual data. I use the following logic to draw a trend line for data source "DS1":
VDEF:DS1Slope=DS1,LSLSLOPE VDEF:DS1Int=DS1,LSLINT CDEF:DS1Trend=DS1,POP,COUNT,DS1Slope,*,DS1Int,+,0,INF,LIMIT LINE1:DS1Trend#808080::dashes'; Is it possible to restrict the trend line to start when my data started instead of at the beginning of the graph? I would assume that any value within DS1 that was before my data would be classified as unknown - is my DS1Trend CDEF removing the unknowns? Thanks, Chris On 23 June 2013 13:17, Chris Mason <ch...@netnix.org> wrote: > Hi, > > I have the following graph which displays daily maximums over a period of > a year: > > http://netnix.org/graph.png > > I have added a trend line to the graph using the Least Square Lines > method. I am currently shifting the graph by 3 months using the following > method: > > -s -1y+3months -e now+3months > > This works fine, but I wanted to try and shift the graph so the start of > the graph is at the left most point and the graph is only ever displayed in > the first 9 month period. It is easy if I only ever had more than 9 months > worth of data, but if I only had 3 months worth of data, then I am looking > for the graph to still start from the left with only the left 3 months > being used? > > I am looking to try and do something similar to the "Filesystem > Utilization and Predicted Trends" graph in the RRDTOOL gallery where in the > picture, the graph is using the left hand side and the trends go into the > right hand side. > > Any pointers? > > Thanks, > Chris >
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