MATLAB: Vertical line through all the subplots

subplotvertical line

How to give a long vertical line throughout one particular plot that contains multiple subplots.

I do not want annotation command.

I would like to use something like

line(x,y);

however this command does not show-up over entire range of subplots. I attach a smiliar figure below.

I want to specify (x,y) with respect to one of the subplots and then get a veritcal line througout the subplots.

Best Answer

x = 1:10 ;
y = rand(1,10) ;
figure
hold on
plot(x,y)
x1 = 5*ones(1,10) ; 
y1 = linspace(min(y),max(y),10);
plot(x1,y1,'--b','LineWidth',5)

Related Solutions

MATLAB: How to plot multiple figures in the same figure in matlab?

plot(x1, y1);
hold on
plot(x2, y2);
plot(x3, y3);

If you need multiple axes that overlap, do not use subplot() as subplot() automatically erases any axes that the new axes would overlap.

ax1 = axes('Position', [10 10 50 50]);
plot(ax1, x1, y1);
ax2 = axes('Position', [20 20 50 50]);
plot(ax2, x2, y2);
ax3 = axes('Position', [30 10 50 50]);
plot(ax3, x3, y3);

MATLAB: Legend for yyaxis at two different locations

The second call to legend() is replacing the first legend (you can only have 1 legend).

I reworked your code to use yyaxis instead of plotyy.

Solution 1: use 1 legend

This solution puts all handles into the same legend. See inline comments for details.

n=-180:180;
x=(pi/180).*n;
y=sin(x);
y2=sin(x).*cos(x);
y3=cos(x);
% Plot on left axis

yyaxis left
h1 = plot(n,y, '-k', 'LineWidth', 1, 'DisplayName', 'h1'); 
set(gca, 'YColor', 'k') % set y axis color to same as line color



hold on
h3=line(n,y3,'Color','r','LineWidth',2, 'DisplayName', 'h3');
% Plot on right axis

yyaxis right
h2 = plot(n,y2, '-b', 'LineWidth', 1.5, 'DisplayName', 'h2'); 
set(gca, 'YColor', 'b') % set y axis color to same as line color

Solution 2: kludge in a 2nd legend

Since you can only have 1 legend per axis, this solution produces a second invisible axis and copies the h2 object to the invisible axis so that it can have its own legend. See inline comments for details.

n=-180:180;
x=(pi/180).*n;
y=sin(x);
y2=sin(x).*cos(x);
y3=cos(x);
% Plot on left axis
yyaxis left
h1 = plot(n,y, '-k', 'LineWidth', 1, 'DisplayName', 'h1'); 
set(gca, 'YColor', 'k') % set y axis color to same as line color
hold on
h3=line(n,y3,'Color','r','LineWidth',2, 'DisplayName', 'h3');
% Plot on right axis
yyaxis right
h2 = plot(n,y2, '-b', 'LineWidth', 1.5, 'DisplayName', 'h2'); 
set(gca, 'YColor', 'b') % set y axis color to same as line color
% Produce left-axis legend
legend([h1,h3], 'Location', 'NorthWest')
% Create invisible axis in the same position as the current axes
ax = gca(); % Handle to the main axes
axisCopy = axes('Position', ax.Position, 'Visible', 'off');
% Copy objects to second axes
hCopy = copyobj(h2, axisCopy); 
% Replace all x values with NaN so the line doesn't appear
hCopy.XData = nan(size(hCopy.XData)); 
% Create right axis legend
legend(hCopy, 'Location', 'NorthEast')

Best Answer

Related Solutions

MATLAB: How to plot multiple figures in the same figure in matlab?

MATLAB: Legend for yyaxis at two different locations

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