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Quiver uniform arrows spacing

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djr
djr on 30 Apr 2020
Commented: Ameer Hamza on 30 Apr 2020
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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Accepted Answer

Ameer Hamza
Ameer Hamza on 30 Apr 2020
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))

  2 Comments

djr
djr on 30 Apr 2020
Ohhh, I just needed to do it in both directions. Thanks a lot!
Ameer Hamza
Ameer Hamza on 30 Apr 2020
Glad to be of help.

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