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: Removing vector elements that exist in another vector
Replies: 5   Last Post: Nov 27, 2012 1:47 PM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Nasser Abbasi

Posts: 5,647
Registered: 2/7/05
Re: Removing vector elements that exist in another vector
Posted: Nov 20, 2012 12:58 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On 11/19/2012 11:33 PM, Nasser M. Abbasi wrote:

>>
>
>> A(ismember(A,H1))=[]
>>

>
> fyi;
>
> another way is
>
> A = setdiff(A,H1);


Just watch out, that setdiff() returns the result SORTED,
while the first solution leaves things as is.

This might be ok for your A or not. It depends on your
use. But you can still use setdiff() if you want, and
get the order back the way it was in A, since setdiff
have another way to be called where it return the indices
used (see help). But this means another extra step to
'unsort' things to the way it was.

I did not see an option to tell setdiff() NOT to sort the result,
but I might have missed it.

--Nasser



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.