MATLAB Answers

Find path between two points with X and Y coordinates

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Erkin Karatas
Erkin Karatas on 29 Dec 2019
Commented: darova on 29 Dec 2019
Hi all, I want to draw path between points, but the paths cannor be diagonal. Therefore the paths should have corners. Think it as a rectangle, you want to move from a corner to another corner, but cannot move diagonally. How can I show that on matlab? The coordinates are attached.
Thanks

  2 Comments

darova
darova on 29 Dec 2019
Can you show your attempts? What have you tried?
Erkin Karatas
Erkin Karatas on 29 Dec 2019
clear all
clc
p = xlsread('coordinates');
for k =1:length(p)
for i = 1:length(p)
x = [p(k,1) p(i+1,1) p(i+1,1) p(i+1,1)];
y = [p(k,2) p(1,2) p(1,2) p(i+1,2)];
x1 = [p(k,1) p(k,1) p(k,1) p(i+1,1)];
y1 = [p(k,2) p(i+1,2) p(i+1,2) p(i+1,2)];
plot(x,y,x1,y1)
i = i+1;
hold on
end
k=k+1;
end
when k is larger than 1, the code does not print the thing I want.

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Accepted Answer

darova
darova on 29 Dec 2019
I reached a succes
p = xlsread('coordinates');
x = p(:,1);
y = p(:,2);
plot(x,y,'.r')
hold on
for i = 1:length(x)-1
plot([x(i) x(i+1)],[y(i) y(i)])
plot([x(i+1) x(i+1)],[y(i) y(i+1)])
pause(0.5)
end
hold off

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Erkin Karatas
Erkin Karatas on 29 Dec 2019
thanks again.
Yes, and I want to store the length of every path. While visiting the points in the file 'coordinate' if I the line crosses an obstacle(which is attached as file), I am going to assign the length of that path as infinite.
clear all
clc
close all
p = xlsread('coordinates');
x = p(:,1);
y = p(:,2);
plot(x,y,'.r')
obst = xlsread('engel');
xo = obst(:,1); %x coordinate
yo = obst(:,2); %y coordinate
wo = obst(:,3); %width
ho = obst(:,4); %height
for i= 1:length(obst)
Rec = rectangle('Position', [xo(i) yo(i) wo(i) ho(i)]); %plotting obstacles
i = i+1;
end
hold on
for i = 1:length(x)-1
plot([x(i) x(i+1)],[y(i) y(i)])
plot([x(i+1) x(i+1)],[y(i) y(i+1)])
pause(0.5)
end
hold off
thank you
Erkin Karatas
Erkin Karatas on 29 Dec 2019
In the end I should have a 50x50 matrix which stores the lengths of each path
clc
clearvars
close all
XY = xlsread('coordinates');
result1=pdist2(XY,XY,'cityblock')
This is how I store my lengths, as I said earlier, if any path crosses any obstacle then the length of that path should be inf or something very large(the value actually does not matter)
darova
darova on 29 Dec 2019
  • While visiting the points in the file 'coordinate' if I the line crosses an obstacle(which is attached as file)
It's too complicated for this forum. You should incorporate your own script
To connect each point with each points use this code:
for i = 1:length(x)-1
for j = i+1:length(x)-1
plot([x(i) x(j)],[y(i) y(i)])
plot([x(j) x(j)],[y(i) y(j)])
pause(0.01)
end
end

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