patch question? image processing

Hello,

using the patch code I'd created a map, anyone know how I can generate the patch without that line (between the island and the corner)..and how can I use the patch with nans data

https://www.dropbox.com/s/qyrkj9b1409197x/patch.jpg

Regards

Answer 1

[Hugo]

How are you creating the patch? Is it only one patch?

If you want the patches to be painted, you will need to create two patches: one for the island and one for the mainland.

Otherwise, you can create only one patch by introducing NaNs. For example:

V=[0,0;1,0;0,1;1,1;2,1;1,2;NaN,NaN];
patch('Vertices',V,'Faces',[1,2,3,1,7,4,5,6,4,7]);

That code creates two triangles without any connection between them.

[Javier]

Hello Hugo. It's only one patch, so, I have this two coastlines separated by NaNs (mainland and island), for example (It's not the real data):

-73.6261  -48.1174
-73.6266  -48.1172
-73.6270  -48.1170
-73.6277  -48.1169
-73.6283  -48.1168
-73.6288  -48.1166
-73.6294  -48.1165
-73.6300  -48.1163
-73.6300  -48.3800
     NaN       NaN
-73.4989  -48.1791
-73.4999  -48.1781
-73.5020  -48.1777
-73.5031  -48.1769
-73.5029  -48.1759
-73.5031  -48.1751
-73.5053  -48.1733
  NaN       NaN

so, I'm trying to do it, but nothing happens =(

[Hugo]

Assume that

V=[-73.6261 -48.1174 -73.6266 -48.1172 -73.6270 -48.1170 -73.6277 -48.1169 -73.6283 -48.1168 -73.6288 -48.1166 -73.6294 -48.1165 -73.6300 -48.1163 -73.6300 -48.3800 NaN NaN -73.4989 -48.1791 -73.4999 -48.1781 -73.5020 -48.1777 -73.5031 -48.1769 -73.5029 -48.1759 -73.5031 -48.1751 -73.5053 -48.1733 NaN NaN];

Be sure that the matrix is m x 2. Then you can do: patch('Vertices',V,'Faces',1:18);

This plots two segments defined by the points you mentioned.Does this helps you?

Otherwise, try using two patches instead:

patch('Vertices',V,'Faces',1:9); hold on patch('Vertices',V,'Faces',11:17);

[Image Analyst]

Please clarify - you accepted the answer so I think this question is done, right?

[Guru]

Yes Image Analyst. Accepting the answer means the question has been addressed to the satisfaction of the person asking the question. He seems to have a few extra questions that he hopes Hugo can assist him with.

[Javier]

yes Hugo, thanks.