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where and NAN numbers [message #42160]

Wed, 12 January 2005 04:02

euskalmet07
Messages: 1
Registered: January 2005

Junior Member

Hi dear IDL user,

Maybe my question is too obvious, but I canï¿½t guess the response.

Having the vector:

IDL> u = [!values.f_nan, 1, 2, 3]

why is different the resulting vector in these following two WHERE functions?

IDL> print, where(u eq 3)
0 3
% Program caused arithmetic error: Floating illegal operand

IDL> print, where(u ge 3)
3
% Program caused arithmetic error: Floating illegal operand

Any response would be appreciated.

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where and NAN numbers

By: euskalmet07 on Wed, 12 January 2005 04:02

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