I have a problem with interpolating a colormap for azimuth / circular data... Please check the attached images: The colormap (HSV) represents the direction of the vectors (ranging from -180 to +180 degrees). Red is left, cyan ist right, greenish is up and purple is down.
For several reasons, I would like to create a smooothed graphical output. That is why I upscale the dataset using the function 'imresize'.
But the result gives a strong line when the direction changes from -180 to +180 (for reasons that I understand, but I can't think of a workaround...).
Does someone have an idea how to prevent this colormap wrapping...? Thanks!!