[gradsusr] how to find typhoon center via minloc function

[Jie TANG]

hi,grads folks ,
  I am using grads v1.9, trying to find the center of typhoon via minloc
function.
the key script is shown as below:
slplat=min(slp,lat=19,lat=26)
tclon=minloc(slplat,lon=119,lon=126)
slplon=min(slp,lon=119,lon=126)
tclat=minloc(slplon,lat=19,lat=26)

but grads tell me that "function not found min "
and when i changed my script to be :
tclat=min(minloc(slpt,lon=119,lon=126), lat=19,lat=26)
tclon=min(minloc(slpt, lat=19,lat=26 )lon=119,lon=126)


how can i finx my scrpit ? thank you .:)
-- 

TANG Jie
Email: totangjie at gmail.com
Tel: 0086-2154896104
Shanghai Typhoon Institute,China
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20110104/77851e26/attachment-0003.html