Quiver does not show any arrows
7 views (last 30 days)
Show older comments
Hello all of you,
Iam trying to use a quiver plot for the first time.
I have a matrix uv(2x251x251) with an uv vector associated to x and y coordinates.
when i try to use
quiver(uv(1,:,:),uv(2,:,:))
i dont see anything. No points or Arrows.
When i try to plot just one vector for just one point with
quiver(uv(1,1,1),uv(2,1,1))
the Arrow shows up and i can see it.
my u and v values range from -1 to 1.
Iam realy new to Matlab and i dont get why i can see something when i plot one vector but not when i try to plot all of them.
Hope you can help me.
0 Comments
Answers (1)
Mischa Kim
on 20 Jan 2014
Edited: Mischa Kim
on 20 Jan 2014
You need to use
quiver(squeeze(uv(1,:,:)),squeeze(uv(2,:,:)))
to turn the 1x251x251 object uv(1,:,:) into a 251x251 matrix.
2 Comments
Mischa Kim
on 20 Jan 2014
As a side note, when using
quiver(uv(1,1,1),uv(2,1,1))
you create 1x1 matrices from uv by completely specifying the vector elements. That's why you see the arrow in this case.
See Also
Categories
Find more on Vector Fields in Help Center and File Exchange
Products
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!