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Re: Byte Swapping [message #37023]

Thu, 20 November 2003 16:20

Richard French
Messages: 173
Registered: December 2000

Senior Member

On 11/20/03 3:27 PM, in article MPG.1a26d18d7232577998974f@news.frii.com,
"David Fanning" <david@dfanning.com> wrote:

> Mike W writes:
>
>> I am having trouble converting binary data from little endian to big
>> endian. Here are my commands:
>>
>> brr=fltarr(1090,820)
>> byteorder,brr,/swap_if_big_endian
>> openr,1,'ndvi0006.d'
>> readu,1,brr
>> close,1
>>
>> and I get this error message as well:
>>
>> % READU: End of file encountered. Unit: 1, File: ndvi0006.d
>> % Execution halted at: $MAIN$
>

In your example, you are swapping a zero-filled array BEFORE you actually
read the data. If you want to use byteorder, you have to do it AFTER you
read the data. Or, you can use the /swap_if_big_endian on the openr command,
as others have pointed out.
Dick French

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[Message index]

		Re: Byte Swapping By: Richard French on Thu, 20 November 2003 16:20
		Re: Byte Swapping By: bc25 on Thu, 20 November 2003 14:35
		Re: Byte Swapping By: David Fanning on Thu, 20 November 2003 12:27

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