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: second largest element in a matrix
Replies: 32   Last Post: May 5, 2013 10:31 AM

Advanced Search

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

Posts: 5,706
Registered: 2/7/05
Re: second largest element in a matrix
Posted: May 5, 2013 12:12 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

On 5/4/2013 9:59 PM, dpb wrote:
> On 5/4/2013 7:54 PM, Nasser M. Abbasi wrote:
>> On 5/4/2013 6:14 PM, tilindg1@gmail.com wrote:
>>

>>> IF for example, i have a matrix [3,1,1,0,2,0]
>>
>> this is not a matrix. it is a list of a vector.

>
> A vector is a 1D matrix...
>


The correct definition of Matrix is

https://en.wikipedia.org/wiki/Matrix_%28mathematics%29

"In mathematics, a matrix (plural matrices) is a rectangular
array of numbers, symbols, or expressions, arranged in rows and columns."

While a vector is a list. For example

http://en.wikipedia.org/wiki/Euclidean_vector

"The endpoint of a vector can be identified with an
ordered list of n real numbers (n-tuple). These numbers
are the coordinates of the endpoint of the vector,
with respect to a given Cartesian coordinate system"

ps.
If one really wants to use one name for all of these
objects, then may be tensor is the correct name to use
and not "matrix".

A tensor of rank (or order) 1 can be represented as
vector, while a tensor of rank 2 can be represented as
a matrix. (these are the correct vector and matrix definitions
as per above, not the matlab ones).

A tensor of rank 0 is a scalar and so on... (ps. a matrix
is not always necessarily a tensor of rank 2 but a tensor
of rank 2 can always be written as a matrix). i.e. tensor
is a more general object.

--Nasser


Date Subject Author
9/18/08
Read second largest element in a matrix
Oluwa KuIse
9/19/08
Read Re: second largest element in a matrix
stephanie
9/19/08
Read Re: second largest element in a matrix
Steven Lord
9/19/08
Read Re: second largest element in a matrix
Oluwa KuIse
9/19/08
Read Re: second largest element in a matrix
Pekka
9/19/08
Read Re: second largest element in a matrix
Oluwa KuIse
9/21/08
Read Re: second largest element in a matrix
Greg Heath
9/24/08
Read Re: second largest element in a matrix
Walter Roberson
3/4/09
Read Re: second largest element in a matrix
Justin
4/6/09
Read Re: second largest element in a matrix
Bruno Luong
4/6/09
Read Re: second largest element in a matrix
Jos
4/6/09
Read Re: second largest element in a matrix
Bruno Luong
4/6/09
Read Re: second largest element in a matrix
Bruno Luong
4/6/09
Read Re: second largest element in a matrix
mike zander
4/7/09
Read Re: second largest element in a matrix
Bruno Luong
4/7/09
Read Re: second largest element in a matrix
Bruno Luong
4/3/09
Read Re: second largest element in a matrix
Paul
11/7/12
Read Re: second largest element in a matrix
sssbi2009@gmail.com
11/19/12
Read Re: second largest element in a matrix
dpb
4/3/09
Read Re: second largest element in a matrix
Paul
4/3/09
Read Re: second largest element in a matrix
mike zander
4/3/09
Read Re: second largest element in a matrix
mike zander
4/3/09
Read Re: second largest element in a matrix
mike zander
4/3/09
Read Re: second largest element in a matrix
Walter Roberson
4/3/09
Read Re: second largest element in a matrix
mike zander
5/4/13
Read Re: second largest element in a matrix
tilindg1@gmail.com
5/4/13
Read Re: second largest element in a matrix
Nasser Abbasi
5/4/13
Read Re: second largest element in a matrix
dpb
5/5/13
Read Re: second largest element in a matrix
Nasser Abbasi
5/5/13
Read Re: second largest element in a matrix
dpb
5/5/13
Read Re: second largest element in a matrix
Bruno Luong
5/5/13
Read Re: second largest element in a matrix
Nasser Abbasi
5/5/13
Read Re: second largest element in a matrix
Bruno Luong

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.