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How to plot quivers only on pixels with an intensity greater than 0?

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Flint Marko
Flint Marko 2021-9-20
编辑： Cris LaPierre 2021-9-20
I am trying to quantify the direction of my quiver plot, but quivers stemming from pixels with an intensity of 0 tend to skew the data. Therefore, I want to stop quivers from being plotted on pixels with an intensity of 0.

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Cris LaPierre
Cris LaPierre 2021-9-20
quiver will not plot nan, so a simple solution may be to replace any value of 0 with nan.
U(U==0)=nan;
V(V==0)=nan;
quiver(X,Y,U,V)
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Cris LaPierre
Cris LaPierre 2021-9-20
编辑：Cris LaPierre 2021-9-20
That was an example of how to get quiver to not draw vectors that met some underlying condition. You can use the variable containing intensity values (which should be the same size as U and V).
U(intensity==0)=nan;
V(intensity==0)=nan;
quiver(X,Y,U,V)

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