
Re: second largest element in a matrix
Posted:
May 5, 2013 6:06 AM


On 5/5/2013 4:21 AM, Bruno Luong 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. > > I'm with dbp on that one. To my book it is a matrix as well. A matrix can have one > of the size reduced to 1. > Wikipedia definition never restrict the size large or equal to 2. > > Matrix backslash operator \ can be applied on matrices, vectors or scalars >because they are all matrices. > > Thinking a matrix must have a size larger than 1 is human, not mathematics. > > Bruno >
I can only go by Mathematics. In Mathematics, a matrix is rectangular array. That is what the teacher told us in class. I also looked up in many other places.
http://www.thefreedictionary.com/matrix
"a. Mathematics A rectangular array of numeric or algebraic quantities subject to mathematical operations. b. Something resembling such an array, as in the regular formation of elements into columns and rows."
http://oxforddictionaries.com/us/definition/american_english/matrix
"3 Mathematics a rectangular array of quantities or expressions in rows and columns that is treated as a single entity and manipulated according to particular rules."
http://chortle.ccsu.edu/vectorlessons/vmch13/vmch13_2.html
"A matrix is a collection of numbers arranged into a fixed number of rows and columns"
http://science.yourdictionary.com/matrix
"Mathematics A rectangular array of numeric or algebraic quantities subject to mathematical operations."
http://www.macmillandictionary.com/us/dictionary/american/matrix
"math an arrangement of numbers or symbols in a pattern from top to bottom and from left to right, used for solving problems in mathematics"
http://mathworld.wolfram.com/Matrix.html
"In his 1851 paper, Sylvester wrote, "For this purpose we must commence, not with a square, but with an oblong arrangement of terms consisting, suppose, of m lines and n columns. This will not in itself represent a determinant, but is, as it were, a Matrix out of which we may form various systems of determinants by fixing upon a number p, and selecting at will p lines and p columns, the squares corresponding of pth order."
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."
Nasser

