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Grumbling about setting double precision [message #78788]

Tue, 20 December 2011 08:58

wlandsman
Messages: 743
Registered: June 2000

Senior Member

I am converting a Python program to IDL which includes several hundred double precision data values. In Python the data values are written as follows:

a = [2721.64363164731, -1615.73035059635]

As described by David Fanning in http://www.idlcoyote.com/math_tips/double.html to make these double precision in IDL, it is not enough to convert the vector to double

IDL> print,double(a),f='(2f18.10)'
2721.6435546875 -1615.7303466797

and it is not enough to put a "d" at the end of one of the values

IDL> a = [2721.64363164731d, -1615.73035059635]
IDL> print,double(a),f='(2f18.10)'
2721.6436316473 -1615.7303466797

Instead, I must spend an hour in my editor putting a "d" at the end of every single data value.

But it would sure be nice to be able to somehow tell the IDL compiler to interpret numeric values as double precision. --Wayne

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[Message index]

		Grumbling about setting double precision By: wlandsman on Tue, 20 December 2011 08:58
		Re: Grumbling about setting double precision By: Karl[1] on Thu, 22 December 2011 12:08
		Re: Grumbling about setting double precision By: Kenneth P. Bowman on Wed, 21 December 2011 10:44

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