Weird Error

[Steven C Chan]

I just checked the data file again.

It is indeed a NaN value not a -9999.99 like number. The original file
actually is created not for Grads -- it is just some binary file written
in a way that is consistent with Grads order of x and y with the NaN
inserted in.

I am not sure if you can set a control file in a way to ignore NaN.

About using set gxout grfill: It did shaded the SST correctly. But Grads
now is also shading the NaN values (i.e. land) together with the
correctly shaded SST.

Steven Chan

Mary Jo Nath wrote:
> Steven,
>
> For SST data values over land should by set equal to the missing value,
> which is not the same thing as "NaN". "NaN" means "not a number", some
> value that isn't able to be interpreted as a number. These usually are
> produced as the result of an invalid operation on floating point values
> (like trying to take the square root of a negative number, for example.)
>
> MJ
>
> Steven C Chan wrote:
>> Sorry for the slow response. I thank you everyone who had replied.
>>
>> The set ccols command is basically a cut and paste of a repeated color
>> setting I have used over a lot of plots.
>>
>> The Grads built that is installed is 1.94b4. About the issues with NAN
>> values, it is SST data, so there are a lot of undefined data points
>> (obviously, over land).
>>
>> What would be the best solution for the problem?
>>
>> Steven Chan
>>
>> Diane Stokes wrote:
>>> BTW, it would help if you include your build info with this type of
>>> question.  In this case, I /think/ you are using an older build and a
>>> more recent version might give you a more informative error msg.
>>