Re: Werid Problem

From: Michael Garay <Michael.J.Garay_at_nyahnyahspammersnyahnyah>
Date: Thu Sep 22 2011 - 09:10:04 MDT

Hi Cheung,

I'll bet the problem is with requiring equality (.eq.) for a double
precision value of 999.9. The fact that your approach works for ­99.0 but
not for 999.9 suggests this might be the case. A simple solution would be
to replace "aa.eq.999.9" with "aa.ge.999.0" (as long as all numbers greater
than 999 are also supposed to be replaced with the default missing value.

Hope this helps.

- Mike Garay

From: Cheung <zuibeidemei@126.com>
Date: Thu, 22 Sep 2011 22:36:34 +0800 (CST)
To: <ncl-talk@ucar.edu>
Subject: [ncl-talk] Werid Problem

Dear all:

                 I have to replace 2 specified values (-99.0 and 999.9) into
default missing value -9999. , in a double array (say aa). But Whatever
methods I took, say:

aa = mask(aa, aa.eq.-99.0, False)
aa = mask(aa, aa.eq.999.9,False)

Or Loop and if case:

 do i = 0, dimsizes(aa)-1
           if(aa(i).eq.-99.0)then
              aa(i) = -9999.0
           end if
           if(aa(i).eq.999.9) then
              aa(i) = -9999.0
            end if
 end do

It just can only substitute the -99.0 into -9999.0, doesn't work to 999.9,
can anyone tell me why and how??

Regards

Cheung

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Received on Thu Sep 22 11:10:20 2011

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