使用八度音阶图，如何用连接线绘制点？

Question

I have data like this:

x = [23, 25, 28, 29, ...]
y = [25, 38, 38, 28, ...]

Now, I can plot the points with plot(x, y, '.r');

I collect above points data by a time sequence, now, I want to connect the points with a line, so that I can see which is the next point of one specific point.

Answer 1

plot() can be used to draw points-and-lines like this:

plot(x, y, 'o-r');

This draws the points as circles, and connects them with lines, all in red.