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Re: reading an ascii file efficiently [message #68903 is a reply to message #68902]

Fri, 27 November 2009 19:58

penteado
Messages: 866
Registered: February 2018

Senior Member
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On Nov 28, 1:27 am, Heinz Stege <public.215....@arcor.de> wrote:
> On Sat, 28 Nov 2009 04:16:35 +0100, Heinz Stege wrote:
>> pos=strpos(rr,',',/reverse_search)
>> result=float(strmid(rr,transpose(pos)))
>
> Oh no, it doesn't work this way. We have to exclude the comma from
> the string:
>
> pos=strpos(rr,',',/reverse_search)
> result=float(strmid(rr,transpose(pos)+1))
>
> Heinz

Cool. I thought about it before, but thought that kind of thing would
not work, because strmid would take the pos array to mean to extract
multiple arrays, instead of associating each element of pos with each
element of rr. I had not realised that it is its first dimension that
is taken as the stride, until I saw your post, and wondered how that
could work, and why you transposed pod.

Nice to know it, I probably have some loops that I get rid of now.
Looking at strmid's documentation, I say it should have been a bit
more clear about this point.

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[Message index]

		Re: reading an ascii file efficiently By: jeanh on Mon, 30 November 2009 06:50
		Re: reading an ascii file efficiently By: natha on Mon, 30 November 2009 06:39
		Re: reading an ascii file efficiently By: David Fanning on Sat, 28 November 2009 11:00
		Re: reading an ascii file efficiently By: penteado on Fri, 27 November 2009 21:04
		Re: reading an ascii file efficiently By: David Fanning on Fri, 27 November 2009 20:56
		Re: reading an ascii file efficiently By: penteado on Fri, 27 November 2009 19:58
		Re: reading an ascii file efficiently By: Heinz Stege on Fri, 27 November 2009 19:27
		Re: reading an ascii file efficiently By: Heinz Stege on Fri, 27 November 2009 19:16
		Re: reading an ascii file efficiently By: penteado on Fri, 27 November 2009 14:45
		Re: reading an ascii file efficiently By: natha on Fri, 27 November 2009 11:02
		Re: reading an ascii file efficiently By: jeanh on Fri, 27 November 2009 10:39
		Re: reading an ascii file efficiently By: b_gom on Fri, 27 November 2009 10:34

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