MATLAB: How to shade area between three lines

shading area

Hello,

I would like to shade under the curve at which is greater than 1 in y value and greater than 20 in y value in the figure below.

But, fill function seems to allow shading the area between two vectors and not allow to use xline and/or yline functions at the same time. Please let me know how I can fill the area (upper right side area under the curve).

Best Answer

I believe there is an error in your description.

Try this interpretation of what I believe you intend:

x = linspace(0, 50);                                            % Create Data

y = 6 * (exp(-(x-10).^2/25) + exp(-(x-25).^2/50));              % Create Data
Lvy = (y >  1) & (x > 20);
figure
plot(x, y)
hold on
patch([x(Lvy) fliplr(x(Lvy))], [ones(size(x(Lvy))) fliplr(y(Lvy))], 'g')
hold off

EDIT —

Added plot figure:

Related Solutions

MATLAB: Shading area under the curve

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')

MATLAB: Fill the region between two lines

Use the patch (link) function:

x=0:0.1:10;
y1=exp(-x/2);
y2=exp(-x/3);
figure
hold all
plot(x,y1)
plot(x,y2)
patch([x fliplr(x)], [y1 fliplr(y2)], 'g')
hold off

To use it, create a closed area (the reason for the fliplr calls, since they create the closed area), and choose the color.

Best Answer

Related Solutions

MATLAB: Shading area under the curve

MATLAB: Fill the region between two lines

Related Question