add reference point with known x y coordinates on imagesc

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Fikret Dogru
Fikret Dogru 2019-2-15
评论： Cris LaPierre 2019-2-16
Hi all,
I need to help about adding point on imagesc plot. I need to add a point with known x and y values (coordinates). But I know the x and y values so I do not want to use ginput or datacursormode. Could we make manual position for datacursormode? I just want to show that point on figure as a 'dot' or '+'. Any help would be great. Thanks
Fikret

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回答（1 个）

Cris LaPierre
Cris LaPierre 2019-2-15
If you have the computer vision toolbox, use insertText.
If not, use the text function.
text(x,y,'+')
Just keep in mind that in an image, 0 for the Y axis is the top left corner instead of the bottom left.
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Cris LaPierre
Cris LaPierre 2019-2-16
Not familiar with that, but I wonder in the enu2ecef function in the mapping toolbox is helpful. I got there from this answer. If not, I'm afraid without more info I can't be of much help as I'm not familiar with this type of data.
Cris LaPierre
Cris LaPierre 2019-2-16
Looks like geodetic2enu might be helpful as well? For the spheroid, you could use
spheroid = wgs84Ellipsoid('km');
to specify the wgs84 geopgraphic units.

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