patch question? image processing

2013 7 6
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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

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Hugo
Hugo 2013-7-6

0 个投票

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.

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Javier
Javier 2013-7-6
编辑：Javier 2013-7-6
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
Hugo 2013-7-6
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
Image Analyst 2013-7-7
Please clarify - you accepted the answer so I think this question is done, right?
Guru
Guru 2013-7-7
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
Javier 2013-7-8
yes Hugo, thanks.

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