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Topic: Parsing Strings
Replies: 3   Last Post: Nov 13, 2012 7:19 PM

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Kevin Ellis

Posts: 53
Registered: 11/29/10
Re: Parsing Strings
Posted: Nov 13, 2012 6:58 PM
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dpb <none@non.net> wrote in message <k7uma4$f1d$1@speranza.aioe.org>...
> On 11/13/2012 3:56 PM, Kevin Ellis wrote:
> > Hello,
> >
> > I have a question regarding parsing strings. Suppose I have a string:
> >
> > S = '42.714 GAL OF SMALL BOAT FUEL @3.699 PER GAL.'
> >
> > I have been trying to figure out a way to remove the numbers 42.714 and
> > 3.699 from the string. I have tried using 'sscanf' and 'regexp' to do
> > this. Using regexp I can find the index of the numbers:

> ...
>
> Is the text fixed or variable?
>
> If it's fixed and simply values change you can use
>
> x = sscanf(S,'%f GAL OF SMALL BOAT FUEL @%f');
>
> sscanf() isn't flexible in mixing conversion of string and numeric
> values but textscan() can.
>
> In regexp the expression needed would be (assuming F format,not E)
>
> s=regexp(S,'[0-9.]','match');
>
> then convert the resulting strings.
>
> --


The text is variable. The placement of the numbers will change and also the price per gallon may not appear at all. How can textscan() help me?

Kevin



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