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Re: IDL strplit : split a decimal number [message #40007 is a reply to message #40005]

Wed, 07 July 2004 08:41

Paolo Grigis
Messages: 171
Registered: December 2003

Senior Member

mwvogel wrote:
> Alternatively, you could use the format syntax
>
> IDL> PRINT, '['+STRSPLIT( STRING(DOUBLE(!pi), FORMAT='(D)'), '.',
> /EXTRACT)+']'
> [ 3] [1415927410125732]

But, last time I checked, pi was equal to 3.14159265358979323846...
try !dpi instead.

It is slightly confusing, however, that IDL

IDL> print,!dpi,format='(D50.40)'
3.1415926535897931159979634685441851615906

makes up some nonsense digits after reaching the machine precision
limit.

I guess I would have preferred a "simpler" output like
3.14159265358979300000000000000000000... when one can easily
spot that the double precision limit is reached at the 15th
digit.

Cheers,
Paolo

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[Message index]

		Re: IDL strplit : split a decimal number By: mwvogel on Wed, 07 July 2004 09:08
		Re: IDL strplit : split a decimal number By: Paolo Grigis on Wed, 07 July 2004 08:41
		Re: IDL strplit : split a decimal number By: mwvogel on Wed, 07 July 2004 07:57
		Re: IDL strplit : split a decimal number By: David Fanning on Wed, 07 July 2004 06:32
		Re: IDL strplit : split a decimal number By: Ben Panter on Wed, 07 July 2004 03:37

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