Is it possible to shade or fill with colour an area under the curve? Or between curves? Many thanks Bojan
MATLAB: Shading (or colouring) area under the curve
curveplots
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I understand the time reference is in sample=data(:,2)
the function to integrate is in w=data(:,3) correct?
and the z=13.2 is some kind of squelch you want to remove while integrating? there is no need to plot 2 functions.
The area you are looking for is trapz(sample,w)
you have assigned z a scalar, but it should match the length of the data to integrate.
The integration goes from around 15 to 250, so the reference vector is tref=[15:1:250]
if you really want to remove those 13.2 (volts?) while integrating, this DC is actually
13.2*ones(1,length(tref)) so if you want to use two trapz, then
trapz(sample,w)-z*ones(1,length(tref))does it make sense?
regards
John
Use area for that purpose by selecting the specific range and use area
x = 0:2500;bw =700;lcom = 611;Lvy = (611 <= x)&(vgrf2 >= bw) & (x < 794);figure(1)plot(x,vgrf2,'k')hold on;xline(lcom,'k--','Lowest COM position','LabelHorizontalAlignment','center',... 'LabelOrientation','horizontal');yline(bw,'k--',{'Body','Weight'},'LabelHorizontalAlignment','left',... 'LabelVerticalAlignment','middle');selected_area = lcom:793;area(selected_area,vgrf2(selected_area),bw,'EdgeColor','none','FaceColor','g')
Also to select all the area ahead of this point which is greater than bw in y and lcom in x
load('sample.mat')x = 0:2500;bw =700;lcom = 611;figure(1)plot(x,vgrf2,'k')hold on;xline(lcom,'k--','Lowest COM position','LabelHorizontalAlignment','center',... 'LabelOrientation','horizontal');yline(bw,'k--',{'Body','Weight'},'LabelHorizontalAlignment','left',... 'LabelVerticalAlignment','middle');ind = (vgrf2>bw)&x>lcom;vgrf2(~ind) = NaN;area(x,vgrf2,bw,'EdgeColor','none','FaceColor','g')
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