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An IDL NORM alternative without overflow [message #88577] Wed, 14 May 2014 02:16 Go to next message
zhangj.sdu is currently offline  zhangj.sdu
Messages: 6
Registered: December 2013
Junior Member
Dear all,
I want to calculate the L2 norm of a vector, for example,a=[0.68056D+200, 0.25521D+200, 0.34028D+200,0.85071D+200, 0.25521D+200, 0.85071D+200]. The IDL NORM function gave nothing but "Program caused arithmetic error: Floating overflow" and "Infinity". Any another IDL solution to avoid this problem?
Thanks.
Clark

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Re: An IDL NORM alternative without overflow [message #88578 is a reply to message #88577] Wed, 14 May 2014 02:44 Go to previous message
Fabzi is currently offline  Fabzi
Messages: 305
Registered: July 2010
Senior Member
On 14.05.2014 11:16, Zhang Jiang wrote:
> Any another IDL solution to avoid this problem?

Use better units for your vector, for example by dividing it by 1D200 ?

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