How do I reverse the y-axis in image?

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Ali
Ali 2014-11-25
回答： Jamel 2022-6-7
The image function reverses the y-axis so I wanted to reverse it to correct it. I know it has something to do with gca but cannot figure out the right code. Please help me.

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采纳的回答

Orion
Orion 2014-11-25
编辑：MathWorks Support Team 2018-11-27
You can change the direction of increasing values along the y-axis by setting the YDir property of the Axes object.
If you want the values to increase from bottom to top (2-D view), then set the value to 'normal'. Alternatively, if you want the values to decrease from bottom to top, then set the value to 'reverse'. For example:
ax = gca;
ax.YDir = 'normal'
  2 个评论
Ali
Ali 2014-11-25
But my instructor says its not a good idea to reverse the axis because this may cause problems when you add further things. Any idea why?
Royi Avital
Royi Avital 2018-5-1
The problem is this operation also flips the data.

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更多回答（4 个）

Chad Greene
Chad Greene 2014-11-25
And another solution:
axis ij
Wagih Abu Rowin
Wagih Abu Rowin 2018-10-5
set(gca,'Ydir','reverse')
Shane
Shane 2014-11-25
Alternatively, you can flip the array. Either fliplr or flipud Flip Left-Right, or Up-Down, depending on how your data is.
plot(X, fliplr(Y))
Jamel
Jamel 2022-6-7
How do I reverse the "Interference from Satellite Constellation Communication Link" code, where the direction starts from the opposite way.

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