一个ctl文件描述多个grd文件中的疑问

二子搞研究

我的目的是想用一个ctl文件描述20个grd文件，手动过于麻烦，还是批量更省心哇。参考了论坛http://bbs.06climate.com/forum.php?mod=viewthread&tid=6663&extra=&page=1的贴子，我自己试着写了一下，但还是有一些问题：
①dset %d1%mc %y2.dat 中系统是如何自动识别d ,mc,y的，靠后面的字符数吗（红色），我自己的文件名是：01.grd,02.grd......20.grd，可不可以任意就写成  dset%d2？ dset%y2?
②tdef 22631 linear 00Z01jan1948 1dy  中，22631=62*365+1也就是所有文件中的总时次，那一个grd中时次为338，那20个的话就是338*20=6760，也没啥问题吧？

③当所有这些都设置完毕了，我们暂且将这个批量ctl文件命名为grd.ctl,那么是在grads命令窗口中输入open grd.ctl??那屏幕会有啥显示？？我的显示如下,那我的那些01 02 03文件的ctl都哪儿去了啊，直接输入01.ctl打开报错啊。。。

求指点！

river

第一个问题，自己看官方文档
http://cola.gmu.edu/grads/gadoc/gadocindex.html
Using Templates

GrADS allows you use a single data descriptor file to aggregate multiple data files and handle them as if they were one individual file. The individual data files must be identical in the X, Y, and Z dimensions and have the same list of variables. The time range of each individual file must be indicated it its filename. Beginning with version 2.0, data files may also be aggregated in the ensemble dimension.

First, the DSET entry has a substitution template instead of a filename. See below for a description of all the possible components of the template. Second, the OPTIONS entry contains the template keyword. Third, the TDEF entry describes the time range for the entire set of data files.

Templating works on any GrADS data type for which you can write a descriptor file. If you specify any additional OPTIONS keywords in the data descriptor file, make sure the options apply equally to each file included in the template.

You can use the set misswarn command to alert you if any of the data files in the templated set is missing.

Templating over TIME

Valid components of the substitution template for the TIME axis are as follows:

%x1   1 digit decade
%x3   3 digit decade
%y2   2 digit year
%y4   4 digit year
%m1   1 or 2 digit month
%m2   2 digit month (leading zero if needed)
%mc   3 character month abbreviation
%d1   1 or 2 digit day
%d2   2 digit day (leading zero if needed)
%h1   1 or 2 digit hour
%h2   2 digit hour
%h3   3 digit hour (e.g., 120 or 012)
%n2   2 digit minute; leading zero if needed
%f2   2 digit forecast hour; leading zero if needed; more digits added for hours >99; hour values increase indefinitely
%f3   3 digit forecast hour; leading zeros if needed; more digits added for hours >999; hour values increase indefinitely
%fn2  2 digit forecast minute; leading zero if needed; more digits added for minutes > 99; minute values increase indefinitely (2.0.a9+)
%fhn  forecast time expressed in hours and minutes (hhnn) where minute value (nn) is always <=59
      and hour value (hh) increases indefinitely. If hh or nn are <=9, they are padded with a 0
      so they are always at least 2 digits; more digits added for hours >99. (2.0.a9+)
%fdhn forecast time expressed in days, hours, and minutes (ddhhnn) where minute value (nn) is always <=59,
      hour value (hh) is always <=23 and day value (dd) increases indefinitely. If dd, hh, or nn are <=9,
      they are padded with a 0 so they are always at least 2 digits; more digits added for days >99. (2.0.a9+)
%j3   3 digit julian day (day of year) (2.0.a7+)
%t1   1 or 2 digit time index (file names contain number sequences that begin with 1 or 01) (2.0.a7+)
%t2   2 digit time index (file names contain number sequences that begin with 01) (2.0.a7+)
%t3   3 digit time index (file names contain number sequences that begin with 001) (2.0.a7+)
%t4   4 digit time index (file names contain number sequences that begin with 0001) (2.0.a8+)
%t5   5 digit time index (file names contain number sequences that begin with 00001) (2.0.a8+)
%t6   6 digit time index (file names contain number sequences that begin with 000001) (2.0.a8+)
%tm1  1 or 2 digit time index (file names contain number sequences that begin with 0 or 00) (2.0.a7+)
%tm2  2 digit time index (file names contain number sequences that begin with 00) (2.0.a7+)
%tm3  3

第二个问题，你自己原来的ctl 该在哪还在哪，打不开你自己去看路径、文件名之类的对不对