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Re: Input line too long??? [message #20753 is a reply to message #20682]

Thu, 20 July 2000 00:00

promashkin
Messages: 169
Registered: December 1999

Senior Member

David Bowman wrote:
>
> [[ This message was both posted and mailed: see
> the "To," "Cc," and "Newsgroups" headers for details. ]]
>
> Pavel,
> Thanks, that worked like a charm! Is there any way of doing the
> same operation when the records are not all of the same length? Just
> curious.

David,
I tried to play with different byte lengths per record and it seems
pretty simple, as long as you know when the record length changes and
those changes are repetitive. Then, you could read the long string in
increments, like this:

;if a string is like:
;.1111 .2222 .3333 .4444 .55 .66 .1111 .2222 .3333 .4444 .55 .66 ... etc,

;then
x = strarr(4)
x[*] = '123456' ; 6-byte field, 4 of them
y = ['1234', '1234'] ; 4-byte field, 2 of them

while not EOF(unit) do begin
readu, unit, x
readu, unit, y
; Reassign X and Y to permanent array(s) to take them out of the loop
endwhile

If varying field lengths were not regularly distributed in the string,
I'd probably just open that file in a word processor and save it as text
with line breaks, then read formatted (READF) as floating point values.
Good solution for a lazy IDLer :-)
Cheers,
Pavel

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[Message index]

		Input line too long??? By: David Bowman on Wed, 19 July 2000 00:00
		Re: Input line too long??? By: promashkin on Thu, 20 July 2000 00:00
		Re: Input line too long??? By: David Bowman on Thu, 20 July 2000 00:00
		Re: Input line too long??? By: Kenneth P. Bowman on Wed, 19 July 2000 00:00

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