c# - Merging multiple pointpairlist -

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i have .wav file , plotting waveform using zedgraph. calculating energies of .wav file of each second , if energy less 4 want draw sample in different color. have created 2 pointpairllist , lineitem there problem while merging these 2 list. here code , how graph appears.

lineitem mycurveaudio; lineitem mycurveaudio2; pointpairlist list1 = new pointpairlist(); pointpairlist list2 = new pointpairlist(); while(true) { (int = 0; < fmainbuffer.length; i++) {    float segmentsquare = fmainbuffer[i] * fmainbuffer[i];    listofsquaredsegment.add(segmentsquare); } float energy = (float)math.sqrt(listofsquaredsegment.sum()); if (energy < 4) {     (int = 0; < read; += (int)window)     {        list1.add((float)(count / ((float)read / (float)window)), fmainbuffer[i]);        count++;     } } else {    (int = 0; < read; += (int)window)    {        list4.add((float)(count / ((float)read / (float)window)), fmainbuffer[i]);        count++;    } } } zgc.masterpane.panelist[1].xaxis.scale.maxauto = true; zgc.masterpane.panelist[1].xaxis.scale.minauto = true; zgc.masterpane.panelist[1].xaxis.type = axistype.linear; zgc.masterpane.panelist[1].xaxis.scale.format = ""; zgc.masterpane.panelist[1].xaxis.scale.min = 0; mycurveaudio = zgc.masterpane.panelist[1].addcurve(null, list1, color.lime, symboltype.none); mycurveaudio2 = zgc.masterpane.panelist[1].addcurve(null, list4, color.red, symboltype.none);

enter image description here lines of mycurveaudio , mycurveaudio2 intersect in picture.

how can merge these 2 list preventing intersections?

i have tried add `double.nan end of lists did not work.

try code below, modified code based on "this thread"

lineitem mycurveaudio; lineitem mycurveaudio2; pointpairlist list1 = new pointpairlist(); pointpairlist list2 = new pointpairlist(); double lastaddedhighenergy = double.nan; double lastaddedlowenergy = double.nan; while (true) {     (int = 0; < fmainbuffer.length; i++)     {         float segmentsquare = fmainbuffer[i] * fmainbuffer[i];         listofsquaredsegment.add(segmentsquare);     }     float energy = (float)math.sqrt(listofsquaredsegment.sum());     if (energy < 4)     {         (int = 0; < read; += (int)window)         {             lastaddedlowenergy = (double)(count / ((double)read / (double)window));             if (lastaddedhighenergy != double.nan)             {                 list1.add(lastaddedhighenergy + ((lastaddedlowenergy - lastaddedhighenergy) / 2.0), double.nan);                 lastaddedhighenergy = double.nan;             }              list1.add(lastaddedlowenergy, fmainbuffer[i]);             count++;         }     }     else     {         (int = 0; < read; += (int)window)         {             lastaddedhighenergy = (double)(count / ((double)read / (double)window));             if (lastaddedlowenergy != double.nan)             {                 list2.add(lastaddedlowenergy + ((lastaddedhighenergy - lastaddedlowenergy) / 2.0), double.nan);                 lastaddedlowenergy = double.nan;             }              list2.add(lastaddedhighenergy, fmainbuffer[i]);             count++;         }     } }  zgc.masterpane.panelist[1].xaxis.scale.maxauto = true; zgc.masterpane.panelist[1].xaxis.scale.minauto = true; zgc.masterpane.panelist[1].xaxis.type = axistype.linear; zgc.masterpane.panelist[1].xaxis.scale.format = ""; zgc.masterpane.panelist[1].xaxis.scale.min = 0; mycurveaudio = zgc.masterpane.panelist[1].addcurve(null, list1, color.lime, symboltype.none); mycurveaudio2 = zgc.masterpane.panelist[1].addcurve(null, list2, color.red, symboltype.none);

if above code not worked, follow steps given in this thread


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