| Re: make strsplit not skip null between patterns [message #75190] |
Thu, 17 February 2011 15:43 |
Garfield
Messages: 2
Registered: February 2011
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Junior Member |
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On Feb 17, 6:07 pm, Michael Galloy <mgal...@gmail.com> wrote:
> On 2/17/11 3:59 PM, Garfield wrote:
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>> Hi all,
>> I am trying to use strsplit to extract data from a string. the string
>> is like this:
>
>> RD|I|04|013|9997|43202|10|1|078|142|20070813|02:00|0.00000|| ||
>> ND|||||||||||.31806
>
>> I am using '|' as the pattern of separator, so the statement is "data
>> = strsplit(line,'|', count=n, /extract)". I do this for thousands of
>> lines. The problem for me is that there is not always an input between
>> a pair of '|', so the dimensions of the 'data' returned by IDL are not
>> constant. I don't want this because every input in between a pair of
>> '|' has different meaning. I want to make the dimension of 'data' to
>> be constant so that I can easily know the meaning of each input.
>
>> Need ideas! Thanks,
>
>> Zhen
>
> Try the setting the PRESERVE_NULL keyword.
>
> Mike
> --www.michaelgalloy.com
> Research Mathematician
> Tech-X Corporation
Mike, thanks a lot! I missed this keyword, which is the last one on
the man page...
Garfield
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| Re: make strsplit not skip null between patterns [message #75192 is a reply to message #75191] |
Thu, 17 February 2011 15:07  |
Michael Galloy
Messages: 1114
Registered: April 2006
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Senior Member |
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On 2/17/11 3:59 PM, Garfield wrote:
> Hi all,
> I am trying to use strsplit to extract data from a string. the string
> is like this:
>
> RD|I|04|013|9997|43202|10|1|078|142|20070813|02:00|0.00000|| ||
> ND|||||||||||.31806
>
> I am using '|' as the pattern of separator, so the statement is "data
> = strsplit(line,'|', count=n, /extract)". I do this for thousands of
> lines. The problem for me is that there is not always an input between
> a pair of '|', so the dimensions of the 'data' returned by IDL are not
> constant. I don't want this because every input in between a pair of
> '|' has different meaning. I want to make the dimension of 'data' to
> be constant so that I can easily know the meaning of each input.
>
> Need ideas! Thanks,
>
> Zhen
Try the setting the PRESERVE_NULL keyword.
Mike
--
www.michaelgalloy.com
Research Mathematician
Tech-X Corporation
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