changing ticks position on the graph
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Hi,
I have a problem that seems to be easy. I have created a heat map in form of matrix but the scale I want to set from -400 to 400. I was able to change the axes numbers but the ticks are at the centre of each square instead to be in between them. How to do it?
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1338629/image.jpeg)
Thank you,
Regards,
Matti
3 件のコメント
DGM
2023 年 3 月 28 日
編集済み: DGM
2023 年 3 月 28 日
If the SW element of the heatmap represents data at (-400, -400), then that's where they're supposed to be in order to communicate that relationship.
If that element represents data at (-440, -440), then you might want to fix your x,y data so that it actually corresponds.
回答 (1 件)
Bjorn Gustavsson
2023 年 3 月 29 日
If you have coordinates for the edges of the cdata-elements then you can either adjust things manually to get what you want:
dx = 80;
dy = 80;
heatmap(x+dx/2,y+dy/2,cdata)
set(gca,'xtick',x,'ytick',y)
Or perhaps use pcolor instead of heatmap:
dx = 80;
dy = 80;
pcolor([x(:)',x(end)+dx],[y(:),y(end)+dy],cdata([1:end,end],[1:end,end])),shading flat
That should be rather close, I hope. This centre-of-pixel vs edge-of-pixel is a problem that will always persist and never have a solution that satisfies every user in all cases - we just have to learn to work around the given behaviours to get the output that corresponds to our use-cases.
HTH
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