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Re: Excluding Decimal Places in the Values of a Variable [message #83204]

Tue, 19 February 2013 12:32

Paul Van Delst[1]
Messages: 1157
Registered: April 2002

Senior Member

On 02/14/13 15:55, David Fanning wrote:
>
> I would do it this way:
>
> IDL> x=[[1.35679, 2.65487], [3.65789, 4.56455]]
> IDL> x = Fix(x*1000)/1000.
>
> Cheers,
>
> David

How's this for a more complicated answer:

FUNCTION SetDP, x, n, double=double
num = 10L^n
rnum = KEYWORD_SET(double) ? DOUBLE(num) : FLOAT(num)
RETURN, FLOOR(x*num)/rnum
END

IDL> x=[[1.35679, 2.65487], [3.65789, 4.56455]]
IDL> print, x
1.35679 2.65487
3.65789 4.56455
IDL> print, SetDP(x,2), format='(f18.15)'
1.350000023841858
2.650000095367432
3.650000095367432
4.559999942779541
IDL> print, SetDP(x,2,/double), format='(f18.15)'
1.350000000000000
2.650000000000000
3.650000000000000
4.560000000000000

:o)

Sorry....

cheers,

paulv

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[Message index]

		Re: Excluding Decimal Places in the Values of a Variable By: Paul Van Delst[1] on Tue, 19 February 2013 12:32
		Re: Excluding Decimal Places in the Values of a Variable By: David Fanning on Thu, 14 February 2013 13:49
		Re: Excluding Decimal Places in the Values of a Variable By: cgguido on Thu, 14 February 2013 13:41
		Re: Excluding Decimal Places in the Values of a Variable By: David Fanning on Thu, 14 February 2013 13:31
		Re: Excluding Decimal Places in the Values of a Variable By: Lisa08 on Thu, 14 February 2013 13:17
		Re: Excluding Decimal Places in the Values of a Variable By: David Fanning on Thu, 14 February 2013 12:55

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