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From: mee gestaf on 16 Jun 2010 10:10
I'm new in Matlab and I'm trying to create a new vector out of the elements of another vector with the condition that the elements should not be contained by another vector. To be more clear I'll give an example:
I have 2 vectors v=[1,2,3,4,5,6] and w=[3,4] . I want to create a vector u, w made by the elements of v and without the elements of w; ex u=[1,2,5,6].
I looked for a function but I couldn't find it. Please can someone tell me how to do this.
From: utab on 16 Jun 2010 10:12
On Wed, 16 Jun 2010 14:10:08 +0000, mee gestaf wrote:


> example: I have 2 vectors v=[1,2,3,4,5,6] and w=[3,4] . I want to create
> a vector u, w made by the elements of v and without the elements of w;
> ex u=[1,2,5,6]. I looked for a function but I couldn't find it. Please
> can someone tell me how to do this.

see help diff
From: mee gestaf on 16 Jun 2010 10:26
utab <utabak(a)tudelft.nl> wrote in message <b1015$4c18dbb4$82a112b1$11192(a)news1.tudelft.nl>...
> On Wed, 16 Jun 2010 14:10:08 +0000, mee gestaf wrote:
>
>
> > example: I have 2 vectors v=[1,2,3,4,5,6] and w=[3,4] . I want to create
> > a vector u, w made by the elements of v and without the elements of w;
> > ex u=[1,2,5,6]. I looked for a function but I couldn't find it. Please
> > can someone tell me how to do this.
>
> see help diff

10x for the riply, but I can't see how this could help me. It says that for
Y = diff(X) calculates differences between adjacent elements of X.
If X is a vector, then diff(X) returns a vector, one element shorter than X, of differences between adjacent elements:
From: dpb on 16 Jun 2010 10:26
utab wrote:
> On Wed, 16 Jun 2010 14:10:08 +0000, mee gestaf wrote:
>
>
>> example: I have 2 vectors v=[1,2,3,4,5,6] and w=[3,4] . I want to create
>> a vector u, w made by the elements of v and without the elements of w;
>> ex u=[1,2,5,6]. I looked for a function but I couldn't find it. Please
>> can someone tell me how to do this.
>
> see help diff

that would be

doc setdiff % (diff() is 1st-order differences within vector)

and friends...

--
From: Matt Fig on 16 Jun 2010 10:30
setdiff(v,u)
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