Hi,
You'll need to define the arguments to the poly_vectors.jnl script
with subsampling. For instance in the example from the script
poly_vec_demo.jnl, instead of region specifications like this:
LET x_vec = X[GX=uwnd,X=120:180] +
0*Y[GY=uwnd,Y=20:60]
LET y_vec = 0*X[GX=uwnd,X=120:180] + Y[GY=uwnd,Y=20:60]
...
they could be
LET x_vec = X[GX=uwnd,X=120:180:6] + 0*Y[GY=uwnd,Y=20:60:4]
LET y_vec = 0*X[GX=uwnd,X=120:180:6] +
Y[GY=uwnd,Y=20:60:4]
...
All of the definitions need to have a consistent delta value for
all the X and Y specifications (or I and J respectively). The
grid in this example is a 2-degree grid in x and y, so these
definitions would choose every third point in Y and every second
point in X.
-Ansley
On 4/21/2016 6:27 PM, 'dessy berlianty'
via _OAR PMEL Ferret Users wrote:
Dear
Ferret Users,
I am
trying to plot vector following the poly_vector_demo; with
increment/skip every nth-grid and filled by speed magnitude.
After
some the steps, such as followings:
- go basemap
- go
poly_vectors.jnl
- polygon/ov/noax/nolab/key
plt_x_arrow,plt_y_arrow,speed
I
still couldn't find the appropriate way to create what I
need, the results is as attached figure (too crowded).
I
wish there would be some suggestion regarding my issue.
I
would be more eager and fully appreciate for any comments
and suggestions, thank you very much.
Sincerely
yours,
dessy
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