How to plot streamlines and Vorticity of the non-uniform data

please help me to draw the streamlines and vorticity contours using the attached non-uniform data of velocity.

hdata = load('horizontalVelocity.mat')

hdata = struct with fields:
    U: [400×100 double]

vdata = load('VerticalVelocity.mat')

vdata = struct with fields:
    V: [400×100 double]

[Adam Danz]

I edited your quesiton to add some more information about the files you attached.

There doesn't apear to be enough information to use streamline. Could you provide an example of how you're using streamline even if it results in an error?