Re: range of values taken on by a scalar

• To: John J Brecht <john.brecht@xxxxxxx>
• Subject: Re: range of values taken on by a scalar
• From: "From: Bill Hibbard <hibbard@xxxxxxxxxxxxxxxxx>" <billh@xxxxxxxxxxxxx>
• Date: Sat, 18 Mar 2000 17:29:01 -0600 (CST)

Hi John,

> So there's no way to do this with just the Scalar itself, you need to
> have it's associated ScalarMap?  (The javadocs for the DataShadow Object
> returned by computeRanges() don't tell me much...)
> 
> What I'm looking to do here is to be able to display the range of values
> of all Data in a Cell to the user, regardless of what values are being
> displayed, or how.

This has been bothering me for a while, too.  So I added
a new method signature to visad.DataImpl:

  public double[][] computeRanges(RealType[] reals)
         throws VisADException, RemoteException;

where the returned array is double[reals.length][2],
giving the min and max value for each RealType in the
reals array.  Note min and max may be Double.NaN.  The
DataImpl.main() method shows how to use this.

Cheers,
Bill
----------------------------------------------------------
Bill Hibbard, SSEC, 1225 W. Dayton St., Madison, WI  53706
hibbard@xxxxxxxxxxxxxxxxx  608-263-4427  fax: 608-263-6738
http://www.ssec.wisc.edu/~billh/vis.html

• References:
  • Re: range of values taken on by a scalar
    • From: John J Brecht