Re: Help: 1.#QNAN ??
- To: mathgroup at smc.vnet.net
- Subject: [mg24783] Re: Help: 1.#QNAN ??
- From: "P.J. Hinton" <paulh at wolfram.com>
- Date: Thu, 10 Aug 2000 00:32:20 -0400 (EDT)
- Organization: Wolfram Research, Inc.
- References: <email@example.com>
- Sender: owner-wri-mathgroup at wolfram.com
On 9 Aug 2000, Phil wrote: > I apologise if this is slightly off-topic, but I imagine many people here > use Mathematica & C++ in computations. In a C++ program I have used 'double' > for all of my values in computations. My outputs are usually shown in the > form 5.324670 etc... but in some cases I get them in this form 1.#QNAN. > What on earth does this mean? It may be a problem as I want to write my > values to file to be read in by another application, and I don't suppose it > will understand what type of value 1.#QNAN is either. Go check your C++ compiler's documentation. I suspect that you are trying to format a number that does not fit within the confines of your formatting string. Take a look at the ranges of values you are planning on displaying and determine whether the formatting string you coded is really appropriate. -- P.J. Hinton User Interface Programmer paulh at wolfram.com Wolfram Research, Inc. Disclaimer: Opinions expressed herein are those of the author alone.