Create line between plot points

Hi Community,

Is there anyway to connet the * in this plot with a line?

Answer 1

[Star Strider]

Yes.

x = [0 10 20 30];
y = [355 433 510 590];

figure
plot(x, y, '*-r')
grid
Ax = gca;
Ax.XMinorGrid = 'on';
Ax.YMinorGrid = 'on';

Connected!

.

Answer 2

[KSSV]

You would have plotted them using

plot(x,y,'*r')

So use:

plot(x,y,'*r')
hold on
plot(x,y,'b')

You can speecify your required markers. Read about plot.

[Kenneth Bisgaard Cristensen]

Hi KSSV,

Thanks, I have tried that, but it does not work for the plot.

[KSSV]

Why not? Can you show us the code which you have tried?

Answer 3

[Steven Lord]

It depends on how you plotted the points.

Case 1: you plotted all the data at once with just the markers

x = 1:10;
y = x.^2;
h = plot(x, y, '*');

Solution: either update the LineStyle property of the object or add a line style to your plot call.

x = 1:10;
y = x.^2;
h = plot(x, y, '-*'); % This line changed
title('With line style added to the plot call')

x = 1:10;
y = x.^2;
h = plot(x, y, '*');
h.LineStyle = ':'; % This line added
title('With line style set (to a different style than above) after the fact')

Case 2: you plotted each point in turn in their own line.

x = 1:10;
axis([0 10 0 100])
hold on
for whichPoint = 1:numel(x)
    plot(x(whichPoint), x(whichPoint).^2, '*');
end

The solutions I'd recommend in this case would be either to assemble the vector inside the loop and plot it after the loop is complete (which reduces to case 1 above) or to use an animatedline.

x = 1:10;
axis([0 10 0 100])
hold on
h = animatedline('Marker', '*', 'LineStyle', '-'); % This line added
for whichPoint = 1:numel(x)
    addpoints(h, x(whichPoint), x(whichPoint).^2); % This line changed
end
title('animatedline approach')

If you're using some other approach to plot these points, please show us a small sample of code you're using to plot the points.