quiver3() reshape error

[jackparmer]

quiver3() always seems to get this error for me:

>> fig2plotly()
To RESHAPE the number of elements must not change.
We had trouble parsing the quiver object.
This trace might not render properly.

% Create a grid of x,y, and z values
[x, y, z] = meshgrid(-0.8:0.2:0.8, -0.8:0.2:0.8, -0.8:0.8:0.8);

% Calculate homogenous turbulence values at each (x,y,z)
u = sin(pi*x).*cos(pi*y).*cos(pi*z);
v = -cos(pi*x).*sin(pi*y).*cos(pi*z);
w = sqrt(2/3)*cos(pi*x).*cos(pi*y).*sin(pi*z);

% Draw a 3 dimensional quiver plot using the quiver3 function
figure
quiver3(x, y, z, u, v, z)

% Set the axis limits
axis([-1 1 -1 1 -1 1])

% Add title and axis labels
title('Turbulence Values')
xlabel('x')
ylabel('x')
zlabel('z')

[jackparmer]

Another example:
http://stackoverflow.com/questions/25740685/create-3d-streamtube-or-streamline-from-particle-trajectory-data