error using streamline function

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Peter
Peter 2015-7-7
评论： Alberto 2015-9-9
I am trying to plot the stream lines for the velocity field in the attached mat file. The vector field is easily plotted using the command
quiver(X,Y,u,v)
However when I try and use the streamline command
streamline(X,Y,u,v,0.5,0.5)
I get the error:
Error using griddedInterpolant Interpolation requires at least two sample points in each dimension.
When I copy paste the basic example from the matlab documentation the streamline function works fine, but I cannot figure out why it will not work for my vector field.

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