How to plot quiver vectors of same length and plot streamlines?

Hi all

I have a velocity field from a glacier (horizontal: ui, and vertical: wi). I can plot it with the code below. How can I

(1) make sure that all quiver arrows are of equal length?

(2) transform these data into streamlines with arrows pointing the direction?

Thanks!

(see attachment for files)

realxh=load('realxh_data.mat').realxh;
realzh=load('realzh_data.mat').realzh;
ui=load('ui_data.mat').ui;
wi=load('wi_data.mat').wi;
nx=34;
figure(1);
quiver(realxh(:,1:nx-1)/1000, realzh(:,1:nx-1), ui(:,1:nx-1), wi(:,1:nx-1));
title('Temperature distribution (°C)');
xlabel('x [km]');
ylabel('Surface elevation [m]');
axis([-10 330 -10 2600])

[Cris LaPierre]

What is nx?

[Yoni Verhaegen -WE-1718-]

@Cris LaPierre nx = 61

[Cris LaPierre]

That produces an indexing error (see above).

[Yoni Verhaegen -WE-1718-]

@Cris LaPierre You are right, it should be changed to 34, sorry.

Answer 1

[Steven Lord]

For part 1, you probably want to normalize your U and V data (if you assemble them into a matrix, the vecnorm function may be of use) then call quiver with the scale input argument being either 'off' or 0.

For part 2, use the X, Y, U, and V data from your quiver call in a similar call to streamline (after turning hold on, of course)?