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Topic: seacrhing/indexing a vector
Replies: 3   Last Post: Jul 6, 2012 9:25 AM

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Daniel Robbins

Posts: 27
Registered: 6/12/12
Re: seacrhing/indexing a vector
Posted: Jul 6, 2012 9:25 AM
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Thanks gents, appreciate the feedback. I can see how to solve my problem now.

Thanks again.

"Nasser M. Abbasi" <nma@12000.org> wrote in message <jt6nfb$9tt$1@speranza.aioe.org>...
> On 7/6/2012 7:23 AM, Daniel Robbins wrote:
> > Hi,
> >
> > I am trying to index a vector so I can establish the location of a
> >given number. So for example, if x = 5 10 15 20 25 I can search
> >for 20 and be given teh answer that 20 is the 4th number in the vector.
> >
> > In a previous code I acheieved this with the line of code:
> >
> > [c index] = min(abs(g-h));
> >
> > However if I try:
> >
> > [c index] = x
> >
> > It does not work. Please can someone offer some help as to
> >how I can search along a vector for a specific value and identify the location of the value?
> >
> > Thank you
> > Dan
> >

>
> hi Dan;
>
> in the first case where it 'worked', you were
> making a call to what is called a 'function'
>
> min is a matlab 'function', not a variable like 'x'
> is in your second example.
>
> a 'function' can return more than one thing if it wants.
> if you see the help on min, you'll see it says
>
> " [Y,I] = min(X) returns the indices of the minimum values in vector I."
>
> but when you write, your second case:
>
> [c index] = x
>
> here 'x' is not a function. it is just a variable name,
> which happened to be an vector.
>
> To answer your main question, you can use find() function
> to "search along a vector for a specific value
> and identify the location of the value"
>
> help find and look at the examples there
>
> --Nasser
>




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