Drexel dragonThe Math ForumDonate to the Math Forum



Search All of the Math Forum:

Views expressed in these public forums are not endorsed by Drexel University or The Math Forum.


Math Forum » Discussions » Software » comp.soft-sys.matlab

Topic: matlab version and "for" loops
Replies: 15   Last Post: Feb 13, 2013 4:53 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
gautamsethi@gmail.com

Posts: 24
Registered: 10/20/05
Re: matlab version and "for" loops
Posted: Jan 26, 2013 10:27 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On Saturday, January 26, 2013 10:22:48 PM UTC-5, Gautam Sethi wrote:
> On Saturday, January 26, 2013 5:50:08 PM UTC-5, Jessica wrote:
>

> > "Jessica " <jly5@duke.edu> wrote in message <kdmql8$n4i$1@newscl01ah.mathworks.com>...
>
> >
>
> > > "Bruno Luong" <b.luong@fogale.findmycountry> wrote in message <kdlt80$st0$1@newscl01ah.mathworks.com>...
>
> >
>
> > > > Here is a simple example, feel free to adapt to your case:
>
> >
>
> > > >
>
> >
>
> > > > GazeType={'Delete' 'Keep' 'Fruit' 'Delete' 'Benzen'}
>
> >
>
> > > > Picture={'Image' 'Picasso' 'Matisse' 'Dali' 'You'}
>
> >
>
> > > > Data = 1:5
>
> >
>
> > > >
>
> >
>
> > > > delete_b = strcmp(GazeType,'Delete') & ~strcmp(Picture,'Image');
>
> >
>
> > > > Data(delete) = []
>
> >
>
> > > >
>
> >
>
> > > > % Bruno
>
> >
>
> > >
>
> >
>
> > > This is much faster-- thanks for the tip!
>
> >
>
> >
>
> >
>
> > And, one other question. If I want to do the same as above except delete based on numbers, how would I do that? If I do:
>
> >
>
> >
>
> >
>
> > delete_b = GazeType(GazeType>10)
>
> >
>
> >
>
> >
>
> > it only lists the numbers that are greater than 10 and I therefore cannot delete those rows.
>
>
>
> If GazeType is a column vector, you can do:
>
>
>
> GazeType(GazeType > 10) = [];
>
>
>
> Gautam.


Since you need to assign the new vector to delete_b, you can do

delete_b = GazeType; delete_b(GazeType > 10) = [];




Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© Drexel University 1994-2014. All Rights Reserved.
The Math Forum is a research and educational enterprise of the Drexel University School of Education.