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Shading area under the curve

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Youngmin
Youngmin on 16 May 2020
Commented: Youngmin on 16 May 2020
Hello,
I am struggling with shading area under the curve at the selected area. I wanted to fill the area over Body Weight line. I have attached my code and the screenshot of the plot.
x = 0:2500;
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');
patch([x(Lvy) fliplr(x(Lvy))], [ones(size(x(Lvy))) fliplr(vgrf2(Lvy))], 'g')
hold off;

  2 Comments

Walter Roberson
Walter Roberson on 16 May 2020
Can you attach your data for testing?
Youngmin
Youngmin on 16 May 2020
I have attached the sample.mat file on the original post. Also, BW is 762.6170, and lcom is 611.

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Accepted Answer

Mehmed Saad
Mehmed Saad on 16 May 2020
Edited: Mehmed Saad on 16 May 2020
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')

  6 Comments

Show 3 older comments
Youngmin
Youngmin on 16 May 2020
Is there any way to remove the solid line of the yline? I think the line created by the area function.
Mehmed Saad
Mehmed Saad on 16 May 2020
set the ShowBaseLine property of area to off
area(x,vgrf2,bw,'EdgeColor','none','FaceColor','g','ShowBaseLine','off')
Youngmin
Youngmin on 16 May 2020
Thank you. it works very well!

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