Unwanted lines show up on surface plots
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See image below. Can anyone help me understand why the extra line shows up on the surface plot?
At first I thought it was a calulated point, however, it is not selectable with the data curser to determine the coordinates.
How can I get rid of these lines?
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Walter Roberson
2018년 12월 26일
The dark lines are from the default 'edgecolor' 'Black' that surf uses. You can get rid of them by passing edgecolor none .
If you want the dark lines but not the apparent spike then you should probably investigate patch() and the various ways it has of specifying edge colour .
surf interpolates face color from four adjacent vertices. If any of the four is nan then the face is nan. But if you have two adjacent non-nan vertices then edge can be drawn between them. If they are surrounded by nan then no face will be drawn leading to edges drawn with no face.
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Image Analyst
2018년 12월 26일
When you call surf() set 'edgelines' to 'none'
surf(x, y, z, 'EdgeLines', 'none');
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Image Analyst
2018년 12월 26일
Right EdgeColor.
Seems like you don't want to set that to none if you like the lines. Looks like you just need to set an additional nan somewhere if you want to get rid of that isolated spike to nowhere. Of course that will be a very, very specific ad hoc fix just for that particular data set.
Walter Roberson
2018년 12월 27일
You might be able to use
zt = z;
zt(imclose(isnan(zt),ones(2,2))) = nan;
surf(x, y, zt, 'edgecolor', 'none')
except that this might not adjust the four corners correctly.
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