MATLAB: Plotting a horizontal line at each data point

MATLAB and Simulink Student Suiteplotting

How to plot a horizontal line at each co-ordinate.Here consider 1a,1b, 1c etc as horizontal points, energy values as vertical points.Also how to indicate which color is used for which.pls help.

Best Answer

Try this: 
x = 1:10;                                               % Create Data


yh = rand(size(x))-2;                                   % Create Data
yl = rand(size(x))-4;                                   % Create Data
hl = @(x,y,l,c) plot(x+[-l l], y*[1 1],c);              % Anonymous Function To Draw Horizontal Lines
figure
hold on
for k = 1:numel(x)
    hl(x(k),yh(k),0.5,'b')
    hl(x(k),yl(k),0.5,'r')
    text(x(k),yh(k), sprintf('%5.2f',yh(k)), 'VerticalAlignment','bottom', 'HorizontalAlignment','center')
    text(x(k),yl(k), sprintf('%5.2f',yl(k)), 'VerticalAlignment','top', 'HorizontalAlignment','center')
    text(x(k),yh(k),'\uparrow', 'VerticalAlignment','top', 'HorizontalAlignment','center')
    text(x(k),yl(k),'\downarrow', 'VerticalAlignment','bottom', 'HorizontalAlignment','center')
    text(x(k), mean([yh(k) yl(k)]), sprintf('%5.2f',(yh(k)-yl(k))), 'VerticalAlignment','middle', 'HorizontalAlignment','center')
    plot([1 1]*x(k),[yl(k) yh(k)+sign(yh(k))*0.1], '-k', 'LineWidth',0.5)
end
yl = ylim;
ylim(yl+[-1 1]*0.2)
.
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