How to drawing co-range chart( tidal phase)

I try to plot co-range chart with my model output data. i attached my cotidal chart code. when i use my code , i have a problem

I notice ferret interpolated the values when the degree values across 360 (or 0). For example, the region between 5 and 355, ferret will interpolate to 180. (Should be 0) This will cause lots of contour line in this region, and give wrong interpolation values. Is there anyone do such interpolation and avoid error like this?

[Filipa Rocha]

did you find an answer to that?