Quiver uniform arrows spacing

Question

djr 2020-4-30

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/522089-quiver-uniform-arrows-spacing

评论： Ameer Hamza 2020-4-30

采纳的回答： Ameer Hamza

在 MATLAB Online 中打开

Hello,

I have the following data (attached) that want to use in quiver plot as follows:

quint = 20;
quiver(xplot(1:quint:end),yplot(1:quint:end),uplot(1:quint:end),vplot(1:quint:end),1, 'Color','k','LineWidth',1)

My grid has a resolution of 50 m but when I reduce the number of arrows with quint to plot every 20th arrow, I get very dense arrows in the diagonal direction on the grid (attached figure).

I would like to have uniform distribution of arrows in the x and y directions.

Can you help me out wth this please?

Thanks.

djr

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Answer 1

Ameer Hamza 2020-4-30

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/522089-quiver-uniform-arrows-spacing#answer_429486

在 MATLAB Online 中打开

You can decrease the density of arrows by downsampling, both along rows and columns

xplot = streamplot{1};
yplot = streamplot{2}.';
uplot = streamplot{3};
vplot = streamplot{4}.';
quint = 20;
quiver(xplot(1:quint:end,1:quint:end), yplot(1:quint:end,1:quint:end), ...
    uplot(1:quint:end,1:quint:end), vplot(1:quint:end,1:quint:end))