grads画剖面图skip的使用疑问

寄居蟹

用GRADS画剖面图，画垂直速度时，使用语句d u;w时，风速比较密。但是使用skip(u,4);w时，水平的风速没那么密了，但是垂直层高度上也变稀疏了。如下图
我希望既能在水平方向上不那么密，垂直方向上也不稀疏。怎样能只改变水平方向的疏密，同时垂直方向的不改变

求教各位这种应该怎么改？谢谢！！感激不尽！！

lqouc

你用fortran重新写一下不就好了。
或者skip（u，4，1）w
总之去看看手册好了。

Aires

把你ctl贴出来看一下

寄居蟹

lqouc 发表于 2013-6-26 09:42

                               
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你用fortran重新写一下不就好了。
或者skip（u，4，1）w
总之去看看手册好了。

谢谢，问题已经解决。

river

基础知识嘛，skip函数分别对u 和w控制不就行了么。
skip()

skip (expr, skipi, skipj)

Sets alternating values of expr to the missing data value.

expr     A valid grid expression that may have 1 or 2 varying dimensions
skipi    Skip factor in the I dimension of expr
skipj    Skip factor in the J dimension of expr
Usage Notes

This function is often used while displaying wind arrows or barbs to thin the number of arrows or barbs. It is not necessary to use the skip function on both the U and V wind components; it is sufficient to populate only one component with missing data values to suppress the plotting of the wind arrow or barb.
Examples

Suppose you have a time series of 3-hourly data, but you want to display values at 6-hourly time steps:

set x 1
set y 1
set t 1 last
d skip(var,2)

To display every other grid point in both the X and Y direction:

d skip(u,2,2);v

To display every grid point in the Y direction, but every 5th grid point in the X direction:

d skip(u,5,1);v

This example script "d_uv.gs" written by Wesley Ebisuzaki automatically sets the skip factor based on the plot dimensions.
*
* This function does a d skip(ugrd,n);v
* where n is automatically set to an appropriate value
*
* usage: d_uv ugrd vgrd
*
* v1.1 w. ebisuzaki
* v1.2 4/6/98 revised empirical formula for skip
*
function duv(arg)
u = subwrd(arg,1)
v = subwrd(arg,2)

* get lat/lon info
'query dims'
lons = sublin(result,2)
lats = sublin(result,3)
dx = subwrd(lons,13) - subwrd(lons,11)
dy = subwrd(lats,13) - subwrd(lats,11)

* Determine skip factor
dn = dx
if (dy > dx) ; dn = dy ; endif
skip = dn / 50 + 0.5
if (skip < 1) ; skip=1 ; endif

* Display the plot
'd skip('u','skip');'v

晓文闯天下

感谢分享，一样的问题

晓文闯天下

感谢分享，一样的问题

lilili

楼主风场的剖面图怎么画

lilili

是不是要先做纬向平均啊？

Pilgrim

你的图为什么往右偏