1D Time series with vector gxout

[Gabriel - ud Carvalho]

Hello friends of grads!
I´m having a problem doing a wind direction 1D plot, for a single point,
with time variation only.
After setting the enviroment
set lat -42
set lon -32
set t (time) 1 13
I´m using this command:
d const(u,0);v;mag(u,v)

The problem:
I´m getting a plot with the proper format, but when verifying the direction
of the wind (at the point I´m setting the enviroment) in a bigger full plot
(set lat -70 -30, lon -60 0, set t 1),
I see that the direction is wrong!
the plot I get only point the vector to one side (upside) never downside...

do someone have an idea about what´s happening?

good day (or nigth!) to everybody,

Gabriel Carvalho
Oceanography Student
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