[gradsusr] Urgent help NEED

[MD ABDUS SATTAR]

Dear Team
I was trying to calculate year by year time series from monthly mean SST
data by using following formula:

[image: Inline image 1]
Where, N3 and N4 denote Nino3 and Nino4 indices respectively. I would like
to calculate NCT and NWP for a specific year, for instance, 1997 (January
to December). My question is how can I define "α

value" in GrADS so that it can use the value of 2/5 when N3*N4>0 and 0 when
N3*N4<0  automatically? If anybody could help me, it would be great.

 I was trying to use "if, else" and "while" function, but I can display
single value. However, I need to display 12 values (Jan to feb).


I look forward to your suggestions.

-- 
Md. Abdus Sattar
PhD Student
Department of Environmental Sciences
Level 2, Australian Hearing Hub Building

Faculty of Science and Engineering
Macquarie University
NSW 2109 Australia


Cell: +61404400401
Email: md-abdus.sattar at students.mq.edu.au

*AND*

Assistant Professor
Department of Disaster Risk Management (DRM)
Faculty of Disaster Management
Patuakhali Science and Technology University, Dumki, Patuakhali, Bangladesh

Cell: +8801716851612
Email: abdus.sattar at pstu.ac.bd
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20151106/5c00508c/attachment.html 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image.png
Type: image/png
Size: 5520 bytes
Desc: not available
Url : http://gradsusr.org/pipermail/gradsusr/attachments/20151106/5c00508c/attachment.png