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[ferret_users] z range (z=zz:zzz) doesn't limit the plotting within the range

Dear Ferret users,

I'm puzzled why

     vector/z=300:900/ . . . v, w

plots vectors below 900 m.  PPL WINDOW,OFF seems to be causing it, but I thought the z range is sufficient to prevent it.  (If the z range is ignored, vectors should be plotted all the way down to the bottom, which is at 6000 m.)

A sample script, the data file, and a sample plot are attached.  (It's actually an extension of the same script I showed a few days ago.)


! =============
set mode grat:dash
set data mv-mw.nc

let fac = 1e3 ! velocity-length scale

define symbol y1_ 30S
define symbol y2_ 28S
let z2_ = 900

!go init-print

let samp_vec_in_ = 0.45
let samp_vec_ = fac/200

/y=($y1_):($y2_)/z=0:100/set mv,mw
  ppl vecset,`samp_vec_in_`,`samp_vec_`
ppl vector,2,3
/y=($y1_):($y2_)/z=94:300/OVER/set mv,mw
  ppl vecset,`samp_vec_in_`,`samp_vec_`
ppl vector/ov,2,1
/y=($y1_):($y2_)/z=300:`z2_`/OVER/set mv,mw
  ppl vecset,`samp_vec_in_`,`samp_vec_`
ppl vector/ov,2,1

!go finish-print try-vector-overlay 3 false

Attachment: try-vector-overlay.pdf
Description: Adobe PDF document

Attachment: mv-mw.nc
Description: Binary data

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