Re: Missing Data Values

• To: Ben Monnahan <monnahan@xxxxxxxxxxxxxxxxxx>
• Subject: Re: Missing Data Values
• From: Tom Whittaker <tomw@xxxxxxxxxxxxx>
• Date: Mon, 22 Jul 2002 14:47:56 -0500 (Central Daylight Time)

Ben:

Usually you can just use Double.NaN (or Float.NaN) for missing values,
but you say you need this to be "indicated" on the graph.  In that case,
you might need/want to make a symbol of some kind?  If you're using
Jython, there's an easy-to-use interface for Shapes or text strings that
would allow you to put little symbols at the points...for example:

   subs.drawString(display, "X", (9321, 101), color="red", center=1)

would draw a red-colored "X" at time=9321, value=101 (assuming time->x
axis and value->y axis).

tom

On Mon, 22 Jul 2002, Ben Monnahan wrote:

> Hi,
>
> I'm creating a simple plotting application.  It uses a simple 2D line
> plot.  Everthing has been going fairly well but I seem to have hit a
> roadblock.  I need missing values to be indicated on the graph.  I found
> the MathType.missingData() method which seems to be a partial answer to
> what I want to do, but I don't know how to use it.  I'm currently using a
> FlatField to store my values. Is this wrong?  It is a really simple graph,
> so I pretty much followed the tutorial.  The function is Time->Value.
>
> Can someone point me in the right direction?
>
>
> Thanks,
> Ben Monnahan
>
>

--
Tom Whittaker
University of Wisconsin-Madison
Space Science and Engineering Center
Cooperative Institute for Meteorological Satellite Studies
Telephone/VoiceMail:  608.262.2759

• References:
  • Missing Data Values
    • From: Ben Monnahan