How to plot scatter type figures using gridded data?

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Leon 2022-2-17

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https://ww2.mathworks.cn/matlabcentral/answers/1652645-how-to-plot-scatter-type-figures-using-gridded-data

回答： KSSV 2022-2-18

As you know, scatter plot takes in a 3-column data. What if my X, Y, and Z are all gridded data with the size of 360 x 180?

How do I display the value in each grid using colors? Kind of like contour but I want to see the values at each of the grids.

Thanks!

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AndresVar 2022-2-18

在 MATLAB Online 中打开

Did you see Interpolate 2-D or 3-D scattered data - MATLAB griddata (mathworks.com)?

I usually just plot Z as a scaled image: Display image with scaled colors - MATLAB imagesc (mathworks.com)

% example

Z=randi(10,3); % "gridded data" 3x3

x=3:6; % x coords you can get from X mesh

y=6:9; % y coords you can get from Y mesh

imagesc(x,y,Z)

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KSSV 2022-2-18

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https://ww2.mathworks.cn/matlabcentral/answers/1652645-how-to-plot-scatter-type-figures-using-gridded-data#answer_898995

在 MATLAB Online 中打开

Use:

scatter(X(:),Y(:),Z(:))

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MATLAB Graphics 2-D and 3-D Plots Data Distribution Plots Scatter Plots

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R2021b

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