[IDV #BWP-558582]: Testing for NaNs in formulas

> address@hidden> wrote:
> 
> >     If you want to call java function Dounble.isNaN inside your jython
> > library, you need to add import java.math at the top of your library. Such
> > as:
> >
> > import java.math
> >
> > def isNaN(a)
> >     return Double.isNaN(a)
> >
> 
> Hello IDV support,
> 
> Your reply is incorrect, there's a colon ':' missing. The corrected line
> should read:
> 
> def isNaN(a):
> >
> 
> Note the colon ':'  at the end of the line.
> 
> Even after correcting the colon, it still produces an error:
> 
> Creating display: Point Cloud
> > NameError: global name 'Double' is not defined
> > org.python.core.PyException
> >
> 
> The error detail is:
> 
> Traceback (most recent call last):
> >   File "<string>", line 1, in <module>
> >   File "<string>", line 8, in log10_py
> >   File "<string>", line 5, in isNaN
> > NameError: global name 'Double' is not defined
> >
> 
> As an example of what I'm trying to do, here's what is in my local Jython
> User's library:
> 
> import java.math
> >
> > def isNaN(a):
> >     return Double.isNaN(a)
> >
> > def example_py(val):
> >    if not isNaN(val):
> >       val = val * 2
> >    return val
> >
> 
> Then, in the Edit Formula dialog, I use 'example_py(name)' to double the
> value of a variable, taking NaNs into account.
> 
> I'd appreciate it if you would provide a tested, working example of this
> simple formula, since I can't get it to work.


Ok, my bad.

Here is a real working example:

from java.lang import Double

def example_py(val):
    if not isNaN(val):
      val = val * 2
    return val

def isNaN(a):
    return Double.isNaN(a)


Yuan
> 
> Thank you.
> 
> --
> Tod Hagan <address@hidden>
> 
> 251 Morse Hall
> Earth Systems Research Center
> Institute for the Study of Earth, Oceans, and Space
> University of New Hampshire
> 8 College Road
> Durham, NH 03824-3525
> 
> 


Ticket Details
===================
Ticket ID: BWP-558582
Department: Support IDV
Priority: Normal
Status: Closed