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Re: How do I prevent underflow errors? [message #14337]

Fri, 19 February 1999 00:00

Ethan Alpert
Messages: 2
Registered: February 1999

Junior Member

Phillip & Suzanne David wrote:

> Unfortunately, our data is NOT all positive, so this doesn't work. However,
> it appears that the really large numbers are due to someone putting a "huge"
> value in where there were holes in the data. We're trying to get them to put
> a smaller "huge" number (1e10?) in instead!

Use the idl operator '<' which can be usIDL> var = [1,2,1e38,1,1e12]ed to convert
every number over
a certain threshold.

i.e:
IDL> var = [1,2,1e38,1,1e12]
IDL> print,var
1.00000 2.00000 1.00000e+38 1.00000 1.00000e+12
IDL> print,var<1e10
1.00000 2.00000 1.00000e+10 1.00000 1.00000e+10
IDL>

1e10 is inserted where ever the value of var is greater than 1e10.

-ethan

--
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Ethan Alpert ethan@ncar.ucar.edu
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[Message index]

		Re: How do I prevent underflow errors? By: Ethan Alpert on Fri, 19 February 1999 00:00
		Re: How do I prevent underflow errors? By: meron on Thu, 18 February 1999 00:00
		Re: How do I prevent underflow errors? By: thompson on Thu, 18 February 1999 00:00
		Re: How do I prevent underflow errors? By: Phillip & Suzanne on Wed, 17 February 1999 00:00
		Re: How do I prevent underflow errors? By: meron on Wed, 17 February 1999 00:00
		Re: How do I prevent underflow errors? By: Ethan Alpert on Wed, 17 February 1999 00:00
		Re: How do I prevent underflow errors? By: Michael Viskum on Wed, 17 February 1999 00:00
		Re: How do I prevent underflow errors? By: Craig Markwardt on Wed, 17 February 1999 00:00
		Re: How do I prevent underflow errors? By: davidf on Tue, 16 February 1999 00:00

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