public void Test4() { Console.WriteLine("Beginning Test4..."); // Time Values DateTime[] timestamps = { new DateTime(2004, 2, 1, 0, 0, 0), new DateTime(2004, 2, 1, 2, 0, 0), new DateTime(2004, 2, 1, 7, 0, 0), new DateTime(2004, 2, 1, 14, 0, 0), new DateTime(2004, 2, 1, 17, 0, 0), new DateTime(2004, 2, 1, 19, 0, 0), new DateTime(2004, 2, 1, 23, 0, 0), new DateTime(2004, 2, 2, 0, 0, 0) }; // Corresponding Data Values double[] values = { 100, 250, 230, 370, 350, 300, 340, 350 }; LinearInterpolator linear = new LinearInterpolator(timestamps, values); CubicSplineInterpolator spline = new CubicSplineInterpolator(timestamps, values); // graph range RrdGraphDef gDef = new RrdGraphDef(timestamps[0], timestamps[timestamps.Length - 1]); // graph title, time and value axis labels gDef.Title = "Plottable demonstration"; gDef.TimeAxisLabel = "time"; gDef.VerticalLabel = "water level [inches]"; // interpolated datasources gDef.Datasource("linear", linear); gDef.Datasource("spline", spline); // splined plot will be an orange filled area gDef.Area("spline", Color.Orange, "Spline interpolation"); // simply interpolated plot will be a red line gDef.Line("linear", Color.Red, "Linear inteprolation@r"); // print average values for both interpolation methods gDef.Gprint("spline", "AVERAGE", "Average spline value: @0 inches@r"); gDef.Gprint("linear", "AVERAGE", "Average linear value: @0 inches@r"); // create the graph... RrdGraph graph = new RrdGraph(gDef); // ...and save it somewhere string filename = "test4.png"; graph.SaveAsPNG(filename, 300, 100); Console.WriteLine("Test4 Complete."); }
public void JonasTest2() { UInt32 start_time = 1370000000; // 31th may 2013, 11:33:20 UInt32 end_time = start_time + 300 * 300; RrdDef rrdDef = new RrdDef("jonas.rrd"); rrdDef.StartTime = start_time; rrdDef.AddDatasource("battery", "GAUGE", 300, 1.0, 5.0); // Five minutes rrdDef.AddArchive("LAST", 0.5, 1, 576); // rrdDef.AddArchive("MIN", 0.5, 1, 576); // 24 hours average, 2.5 minutes resolution rrdDef.AddArchive("MAX", 0.5, 1, 576); // 24 hours average, 2.5 minutes resolution rrdDef.AddArchive("AVERAGE", 0.5, 6, 672); // 7 days average, 15 min resolution rrdDef.AddArchive("MIN", 0.5, 6, 672); // 7 days average, 15 min resolution rrdDef.AddArchive("MAX", 0.5, 6, 672); // 7 days average, 15 min resolution rrdDef.AddArchive("AVERAGE", 0.5, 24, 87600); // 10 year average, 1 hour resolution rrdDef.AddArchive("MIN", 0.5, 24, 87600); // 10 year average, 1 hour resolution rrdDef.AddArchive("MAX", 0.5, 24, 87600); // 10 year average, 1 hour resolution RrdDb db = new RrdDb(rrdDef); db.Close(); RrdDb rrd = new RrdDb("jonas.rrd"); Random rand = new Random(); //Sample s = rrd.CreateSample(); // update for(long t = start_time + 300; t <= end_time; t += 300) { double r = (double)rand.Next(1, 6); //s.SetAndUpdate(String.Format("{0}:{1}", t, r)); Sample sample = rrd.CreateSample(t); sample.SetValue("battery", (double)r); sample.Update(); Console.WriteLine(r); } FetchRequest fr = rrd.CreateFetchRequest("LAST", start_time, end_time - 300); FetchData fd = fr.FetchData(); for (int i = 0; i < fd.RowCount; i++) { FetchPoint fp = fd.GetRow(i); Console.WriteLine("{0}: {1}", fp.Time, fp.Values[0]); } rrd.Close(); // Create new graph for the last 12 hours RrdGraphDef gdef = new RrdGraphDef(new DateTime(2013, 05, 31, 12, 00, 00), new DateTime(2013, 05, 31, 18, 59, 59)); gdef.Title = "Battery voltage"; gdef.VerticalLabel = "U (V)"; gdef.SetValueAxis(1.0, 1.0); gdef.SetGridRange(1.000, 5.000, true); gdef.Datasource("vbat", "jonas.rrd", "battery", "LAST"); //gdef.Datasource("vbat_avg", "jonas.rrd", "battery", "AVERAGE"); gdef.Datasource("vbat_trend", "vbat,900,TREND"); gdef.Line("vbat", System.Drawing.Color.Green, "Battery voltage", 1); //gdef.Line("vbat_avg", System.Drawing.Color.Red, "Average over 15 min", 1); gdef.Line("vbat_trend", System.Drawing.Color.Red, "Trend over 15 min", 1); gdef.Gprint("vbat", "LAST", "Current: @2V@r"); gdef.Gprint("vbat", "AVERAGE", "Average: @2V@r"); gdef.Gprint("vbat", "MAX", "Max: @2V@r"); gdef.Gprint("vbat", "MIN", "Min: @2V@r"); RrdGraph graph = new RrdGraph(gdef); graph.SaveAsPNG("battery2_2h.png", 700, 300); }