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Re: double precision? [message #49697 is a reply to message #49694]

Fri, 11 August 2006 12:15

adisn123
Messages: 44
Registered: July 2006

Member

I tried your way, but IDL prints

IDL> a = 1.24500000476837
IDL> print,a,format='(f50.25)'
1.2450000047683715820312500
IDL>

Furthermore, the variable a is constantly used throughout the whole
program.
Is there a way that all the other calculation use the same a and makes
output in the same
decimal points?

R.G. Stockwell wrote:
> <adisn123@yahoo.com> wrote in message
> news:1155241088.452911.315540@i3g2000cwc.googlegroups.com...
>> Hi,
>>
>> The value that I want to keep in a variable, a, is
>> 1.24500000476837.
>> After I define as
>> IDL> a = 1.24500000476837
>> then, print, a
>> IDL> print, a
>> IDL> 1.2450000
>> so, I tried
>> IDL> a = 1.24500000476837d ;; to make it as a double precision, but
>> IDL prints
>> IDL> help, a
>> A DOUBLE = 1.2450000
>> IDL> print, a
>> 1.2450000
>>
>>
>> How can I keep all those decimal points?
>> I thought double precision can express up to 14 decimal places of
>> significant points?
>
>
> Try
> IDL> print,a,format='(f50.25)'
> 1.2450000047683700000000000
>
> Cheers,
> bob

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[Message index]

		Re: double precision? By: Chris[2] on Fri, 11 August 2006 13:17
		Re: double precision? By: adisn123 on Fri, 11 August 2006 12:15
		Re: double precision? By: news.qwest.net on Thu, 10 August 2006 13:35
		Re: double precision? By: adisn123 on Mon, 14 August 2006 09:45

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