Quiver3 help 3d vector plot Error

Robert

2015 2 14

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All i would like to do is plot a vector field and examine the field at a certain point.

My field is represented by

E = p*cos(phi) + p*sin(phi) + z^2 Im not sure how to add the unit vectors in this text but please assume these are the

U_Rho , U_Phi , and U_z directions.

So far i have

[p,phi,z] = meshgrid(0:.2:2*pi,0:.2:2*pi,0:.2:2*pi);
quiver3(p,phi,z,p*cos(phi),psin(phi),z^.2)

I have used this before in 2D with the regular quiver and it has worked just fine. Now I'm getting an error that says

Error using ==> mtimes Inputs must be 2-D, or at least one input must be scalar. To compute elementwise TIMES, use TIMES (.*) instead.

What am i doing wrong

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Robert 2015-2-14

No one can help on this?

Star Strider 2015-2-14

We might, but there's significant information missing. Give an example of your data, and what you want as a result. It’s not obvious to me. For a quiver3 plot you need origins and derivatives for each argument. Please give examples of these, and the range of data (ρ, φ, z) you are interested in.

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