How to make a piecewise linear plot from points?

My point coordinates are P1(1,1) ,P(3,2), P(3,3), P4(1,4). i need to make a piecewise linear plot i.e. line from P1 to P2, P2 to P3, P3 to P4? How can I do this simply? The number of points might increase.

I want the graph to be similar to the graph attached, the outer piecewise linear plot.

Answer 1

[Matt J]

Just use PLOT, e.g.,

x=[1,3,3,1];
y=[1,2,3,4];

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

Answer 2

[Image Analyst]

What I think you have is a continuous curve.

What I think you're asking for is called the "minimum perimeter polygon".

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