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• Round to Significant Digits

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; This UDF will round a number to a specified number of significant digits
; e.g.  sigr(12783,2) becomes 13000

#DefineFunction sigr(value,sigfigs)    ; round to desired number of significant digits
   e=sigfigs-(1+Int(Log10(Abs(value)))); compute power of 10 needed
   multdiv= 10.0**e                    ; create the E notation number
   ret= Int(value*multdiv)/multdiv     ; adjust, simple round, unadjust
   Return(Int(ret))                    ; ta-da
#EndFunction

zz=12783
xx=sigr(zz,2)
Message("",xx)

Article ID:   W16739

File Created: 2005:02:18:12:22:08

Last Updated: 2005:02:18:12:22:08