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Questions about viewport



Hi everybody
I'm drawing a plot which includes multiple viewport vertically.
Suppose there are 3 viewports, each of them takes up the full width of
the screen, and 1/3 of the screen vertically.
The problem is that the more viewports I defined, the smaller each
of them vertically. If the number of viewports is over 4 or 5, I can
hardly see the vertical scale of the picture because it's too small.
How can I make the picture bigger? My code is attached below.
Thanks a lot, Ding


! Main ferret script
! Ferret v3.0 *jd* 3.93/8.96
! Description: create a filled-area test plot

let varnum = $1
let dataset= varnum+2
let depth = varnum+3
let t_lo = varnum+4
let t_hi = varnum+5

use $`dataset`
if `varnum eq 1` then
go Mooring_do_plot 0 1 0 1 $`varnum+1` $`depth` $`t_lo` $`t_hi`
endif

if `varnum gt 1` then
repeat/l=2:`varnum+1` (go Mooring_do_plot 0 1 `(l-2)/varnum` `(l-1)/varnum` $`l` $`depth` $`t_lo` $`t_hi` $`dataset`)
endif
exit


!Here is the script Mooring_do_plot
DEFINE VIEWPORT/XLIM=$1,$2/YLIM=$3,$4 myview
SET VIEWPORT myview
plot/z=$6/t=$7:$8 $5





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