Plotting tidal speed and direction in R

You can use the 'my.symbols' and 'ms.arrows' functions in the
TeachingDemos package to plot arrows at given locations with specified
angles, lengths, and colors.
Hi,

I have had a look around the forums and I can't seem to find anything that
works with my data. ?I have lats, longs, time, tidal speed and direction and
need to plot this in an xy plot to determine changes over time. contour and
cloud have been recommended to me as a way to do this but I can't figure out
how to get 5 dimensions into this. ?I want lat and long as my x and y, time
as my z, direction as w and speed as different colours. ?I imagine it's a
lot easier than I think it is - I am very new to R. ?Could anyone please
help with a starting point for this?

Thanks,

Zoe

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Plotting tidal speed and direction in R

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