how to plot connected points ?

How do i plot(x,y) such that the points are connected to each other instead of from the origin ?

Answer 1

[Star Strider]

I was able to reproduce your problem:

x = [zeros(1,10); 1:10];                            % Simulate Data
x = x(:);                                           % Simulate Data
y = [zeros(1, 10); rand(1, 10)];                    % Simulate Data
y = y(:);                                           % Simulate Data

figure(1)
plot(x, y)                                          % Reproduces Problem

figure(2)
plot(x(x ~= 0), y(y ~= 0))                          % Fixes Problem

The solution is to take the non-zero values in both the x and y vectors, as I do in figure(2). That should give you the plot you want.

[RuiQi]

Argh forgot about that 'trick' ! Thanks so much !

[Star Strider]

My pleasure!

Answer 2

[Image Analyst]

If you want them going monotonically from left to right, then you can sort them.

[newX, sortOrder] = sort(x); % Sort x ascending.
newY = y(sortOrder); % Sort y in exactly the same order.
plot(newX, newY, 'b-*');
grid on;