Math Forum Discussions

Ian

Posts: 14
Registered: 9/21/10

Re: Quick Problem (sorting data)
Posted: Sep 30, 2010 6:24 AM

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"Jos (10584) " <#10584@fileexchange.com> wrote in message <i81jtr$bm6$1@fred.mathworks.com>...
> "Ian " <ikirby23@yahoo.com> wrote in message <i81j9m$27e$1@fred.mathworks.com>...
> > In matlab how would I locate the values from (g) using the values from (f) and create them as a seperate variable (h):
> >
> > g=[ 7 2520
> > 8 2375
> > 10 3618
> > 12 2694
> > 14 2158
> > 15 2842]
> >
> > f=[2520;3618;2842]
> >
> > The variable I would want to create from (g) using (f) would be:
> >
> > h=[7 2520
> > 10 3618
> > 15 2842]
> >
> > I acknowledge this is probably a very straight foward excercise, but I have only really started using matlab and cannot seem to find a way of doing these on the help guide. I know this could be done just by creating a new variable by simply typing the new vaules in as shown in (h), but the data set I have is very much larger than the example shown here.
>
> help ISMEMBER
> use the last column of g as one of its input and use the output to logically index into g.
>
> hth
> Jos

Right so I would create a variable from (g) using the last column:a=g(:,2); and use this as an input and use (f) as an output. How would I then logically index this into (g)?