Thread Subject: arrows in streamline

Hello,

anyone who knows how to draw streamlines in Matlab with specified starting points and arrows on each of them? Streamslice can draw arrows, but I'm not sure wether the starting points can be specified.

Thanks!

Pieter

Gee ! I have exactly the same question. Any luck since your post ?
Indeed, streamslice does that only in a 2D-plane, if I understood it correctly. I personally need that for representation of magnetic field lines.

"Pieter Jacqmaer" <pieter.jacqmaer@gmail.com> wrote in message <h6pmnh$qu7$1@fred.mathworks.com>...
> Hello,
>
> anyone who knows how to draw streamlines in Matlab with specified starting points and arrows on each of them? Streamslice can draw arrows, but I'm not sure wether the starting points can be specified.
>
> Thanks!
>
> Pieter

you can use streamline(...) to draw the streamlines, then use get(...) to get the XData and YData of each streamline (do this in a loop) and put the information in a X and Y matrix. Then use quiver(X,Y,ux,uy,scaling) to put the arrows on the streamlines. You might want to define a vector nx = 1:floor(size(X,2)/n):size(X,2); where the integer n defines how many points you want to use to plot the arrows. If you dont do this, you get many arrows and the plot gets unreadable. If you do so, use quiver(X(ny,nx),Y(ny,nx,ux(ny,nx),uy(ny,nx),scaling)

Fab