comp.lang.idl-pvwave archive: archive » Re: Convert hex string to number

Home » Public Forums » archive » Re: Convert hex string to number

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Re: Convert hex string to number [message #44566 is a reply to message #44342]

Fri, 24 June 2005 15:02

Michael Wallace
Messages: 409
Registered: December 2003

Senior Member

>> Assume you have a hexadecimal number stored as a string. How do you
>> convert this string to a numeric data type? I can easily convert a number
>> into a hex string, but how do you go the other way?
>>
>> -Mike
>
>
>
> IDL> s = 'f'
>
> IDL> reads, s,out,format='(z)'
>
> IDL> help,out
>
> OUT FLOAT = 15.0000

It seems that when the hex numbers get so big, I start losing precision
on the conversion. I have tried a number of different ideas with the
format codes, but nothing has worked so far. It appears that reads
always stores the output value as a float despite how big the input
number is. Is there a way to for it to use double or long on the
conversion?

IDL> reads, '1234abcd', output, format = '(Z)'
IDL> print, output, FORMAT = '(I10)'
305441728
IDL> reads, '1234abce', output, format = '(Z)'
IDL> print, output, FORMAT = '(I10)'
305441728
IDL> reads, '1234abcf', output, format = '(Z)'
IDL> print, output, FORMAT = '(I10)'
305441728

Something is not right with the above picture...

-Mike

Report message to a moderator

[Message index]

		Re: Convert hex string to number By: Michael Wallace on Fri, 03 June 2005 13:43
		Re: Convert hex string to number By: R.G. Stockwell on Fri, 03 June 2005 13:26
		Re: Convert hex string to number By: Benjamin Hornberger on Fri, 03 June 2005 13:16
		Re: Convert hex string to number By: Michael Wallace on Fri, 24 June 2005 15:02

Previous Topic:	Re: GeoTIFF tags and keys
Next Topic:	Convert hex string to number

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Thu Oct 09 19:22:47 PDT 2025

Total time taken to generate the page: 0.71945 seconds