lines from the corner

[Adam Sobel]

Diane,

thanks a lot.  You are right.  The file has NaNs in it.  Looking over
old posts on this
problem I was hoping to find a way to treat NaN as a missing value
without having to
actually go and rewrite the file.  So far it looks like this is not
doable, but if I'm wrong
maybe someone could let me know how to do that.

thanks
Adam

Diane Stokes wrote:

> Adam,
>
> Looking closely at your plot, I wonder if you have bad values at some
> coastal points.
>
> I suggest you zoom in on one of those areas and use gxout grid or
> print to check that you have good values or the correct "missing"
> value at all points.
>
> If that's not the cause, what version of grads are you running?  A
> user here encountered similar problems (with presumably good data) but
> his plot was fine when he switched to version 1.9b4.
>
>    Diane
>
>
> Adam Sobel wrote:
>
>> Hello,
>>
>> I have a data file (netcdf, opens fine with sdfopen) which when I try
>> to make a contour plot, gives me straight lines from the corner which
>> cover up the plot, which otherwise would look fine. Example attached.
>> I suspect it has something to do with the fact that this data is all
>> missing over the land (it is an ocean-only data set) but other than
>> that can't see what's wrong. Changing the contour interval doesn't
>> help. I found another post on this behavior in the archive but no one
>> seems to have answered that one (a few years ago). Any insight
>> appreciated.
>>
>> thanks
>> Adam
>>
>> --
>> Adam H. Sobel
>> Department of Applied Physics and Applied Mathematics
>> Department of Earth and Environmental Sciences
>> Columbia University
>> 500 W. 120th Street, Room 217
>> New York, NY 10027
>> tel: 212-854-6587
>> fax: 212-854-8257
>> e-mail: ahs129 at columbia.edu
>> web: http://www.columbia.edu/~ahs129/home.html
>>
>>
>> ------------------------------------------------------------------------
>>
>

--
Adam H. Sobel
Department of Applied Physics and Applied Mathematics
Department of Earth and Environmental Sciences
Columbia University
500 W. 120th Street, Room 217
New York, NY 10027
tel: 212-854-6587
fax: 212-854-8257
e-mail: ahs129 at columbia.edu
web: http://www.columbia.edu/~ahs129/home.html