Plotting line between points

Hello

I've been searching around a bit but can't find any similar problem/solution. Say I'm generating a matrix with following values:

phase =

    0.0010  -90.0000
    0.0457         0
    0.1903   90.0000
    1.9026         0
  100.0000         0

What I'm looking to do is to plot a line between those points like this:

(0.0010, -90) to (0.0457, -90)
(0.0457, -90) to (0.0457, 0)
(0.0457, 0) to (0.1903, 0)
(0.1903, 0) to (0.1903, 90)
(0.1903, 90) to (1.9026, 90)
(1.9026, 90) to (1.9026, 0)
(1.9026, 0) to (100, 0)

How can I do this without too much fuzz? Basically some sort of a square wave with variable amplitude.

I got the result I wanted doing it like this, but I was wondering if there was another clever way of doing it?

j = 1; k = 2;
for i = 1:length(phase)*2-2
     semilogx([phase(j,1) phase(k, 1)], [phase(k-1, 2) phase(j, 2)], '--r')

       j = j + mod(i, 2); % Increment 1 when odd
       k = k + ~mod(i, 2); % Increment 1 when even
  end

Answer 1

[Adam]

phaseX = [phase(:,1)'; [-1 phase(2:end-1,1)' -1] ];
phaseX( phaseX == -1 ) = [];

phaseY = [phase(1:end-1,2)'; [phase(1:end-1,2)'] ];

figure; semilogx( phaseX, phaseY(:), '--r' )

does the job I think. Whether it is 'clever' or not is debateable. There's probably a neater way to put the x values together that someone can probably come up with!

Answer 2

[Adaptine]

That's a neat way. Improved it abit:

phase = repelem(phase, 2, 1);
semilogx(phase(2:end-1,1), phase(1:end-2,2), '--r' )

But can it e improved even more? :P