how to redraw contourf after changing scale

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roudan 2018-4-18

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https://ww2.mathworks.cn/matlabcentral/answers/395930-how-to-redraw-contourf-after-changing-scale

回答： roudan 2018-4-19

I used contourf. after changing the scales like colorbar min/max/interval, contour line interval etc, how to redraw the contour quickly? I found some contour in previous plot still exist so cause overlapping. Do I have to delete the contourf first? Thanks

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Answer 1

Walter Roberson 2018-4-19

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If you are just changing the properties of the contour object returned by contourf() then the graphics will update by themselves the next time the event queue is flushed.

If you already have the handle of a contour object returned by contourf(), and you want to change x, y, z data, and the other properties are going to remain the same, then you can update the XData, YData, or ZData properties of the contour object. The graphic will update by itself the next time the event queue is flushed.

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roudan 2018-4-19

Walter, one more question, how to modify the contour's title? I didn't find title property of contour. The contour was plot on subplot. I also tried to set subplot's title using its handle. it didn't work either. it say "No public property title exists for class matlab.graphics.axis.Axes"

Thanks for helping.