Diagonal Line in fill plot?

Got i hope a simple question for you all , in my foillowing code i have a random diagonal line and i have no idea where it is coming from?

any help would be great thank you in advance :)

RoadVerts =[-1,  9, 9,  11, 11, 21, 21, 11, 11, 9,  9,  -1, -1
            11, 11, 21, 21, 11, 11, 9,  9,  -1, -1, 9,   9, 11
            0,  0,  0,  0,  0,  0,  0,  0,  0,  0,  0,   0, 0
            1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,   1, 1];
fill(RoadVerts(1:1,:),RoadVerts(1:2,:),'w');

xlim([0 20])
ylim([0 20])
zlim([0 5])

[Jan]

A screenshot would be useful.

[Jake Simmonds]

Answer 1

[Jan]

I guess you mean the diagonal from (0,0) to (21,21). Change the fill command to:

% Was: fill(RoadVerts(1:1,:),RoadVerts(1:2,:),'w');
fill(RoadVerts(1,:), RoadVerts(2,:), 'w');

1:1 can be simplified to 1, and 1:2 as second coordinate is most likely a typo.

[Jake Simmonds]

Thank you kindly much appreciated <3

[Jake Simmonds]

[Jake Simmonds]

Much nicer now :)