Re: Irregular3DSet and double ?

• To: Alexandre Delarue <adelarue@xxxxxxxxx>
• Subject: Re: Irregular3DSet and double ?
• From: "From: Bill Hibbard <hibbard@xxxxxxxxxxxxxxxxx>" <billh@xxxxxxxxxxxxx>
• Date: Sat, 15 Jan 2000 10:53:20 -0600 (CST)

Hello Alexandre,

> 1>I'm using an Irregular3DSet to define the domain_set of a FlatField. I
> need double precision for my datasets. Why can't we use double with an
> Irregular3DSet ? Is there any other way to create a 3D domain_set based
> on non gridded double values (w/o using Irregular3DSet) ?  I would like
> to avoid rescaling and recasting to float the datasets to get the right
> information on the scale axis.

Originally, the sample locations in Sets were all doubles,
but that used so much memory that we changed them to floats.
We added the class Gridded1DDoubleSet to support unevenly
spaced samplings of RealType.Time, which need doubles to encode
dates and times in a single number with adequate resolution.
It would be possible to add a class Irregular3DDoubleSet, but
it would take some real work.

If your data don't really need double precision, converting
doubles to floats will be a lot easier than creating a new
class Irregular3DDoubleSet.

> 2> Is there any way to make an axis display [-1000;1000] for let's say
> data that have previously been rescaled to [-1.0;1.0] ?

If you've done:

  ScalarMap xmap = new ScalarMap(x, Display.XAxis);
  xmap.setRange(-1.0, 1.0);

then later you can do:

  xmap.setRange(-1000.0, 1000.0);

and that should change the axis scale.

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:
  • Irregular3DSet and double ?
    • From: Alexandre Delarue