Friday, January 8, 2010

matrices in real world

we can know from this example how marix ca be usefull for some one who has his own store and wants to do his own sales.
Matrix operations are frequently used in real world computations.
Suppose a matrix gives the number of different computers that Michael sells in the first two months at his new job. He sells 30 units of computer Brand X, 21 units of computer Brand Y,
and 11 units of computer Brand Z. These sales numbers have been entered in matrix [A].
The row gives the number of sales for each brand and the columns represent the
brand of computer. The name of this matrix is matrix [A] and its dimension is 1 by 3 (1 x
3). This means that the matrix has one row and three columns.
Michael sells a Brand X computer for $999.95, a Brand Y computer for $875.50,
and a Brand Z computer for $1059. Matrix [B] gives the prices of the three brands of
computers. This time, the rows give the brands and the column gives the price of each
type of computer. The dimension of matrix [B] is 3 x 1.
Michael gets a commission of 12% on each computer he sells. Multiply matrix
[B] by 0.12 to compute the commission on each brand of computer.
How much is his total commission? Store (STO key) the results of the
multiplication to a new matrix, [C]. Multiply matrix [A] (the row gives the number of
computers and the columns give the type of computer) by matrix [C] (the rows give the
type of computer and the column gives the commission on each type) to obtain the total
commission for this number of computer sales. The product of a 1 x 3 matrix and a 3 x 1
matrix is a 1 x 1 matrix (one row and one column). His total commission is $7,203.96.

Naji Achkar mat 215 course linear algebra
application:wiki.answers.com/.../Applications_of_matrix_in_real_life

3 comments:

  1. Naji, is it Naji???

    1) You did not include your full name
    2) you did not include the LINK where you got the information
    3) YOUR POST CANNOT BE UNDERSTOOD! You just COPIED AND PASTED and half of the info is NOT there!!!!!!!

    Please delete and if READ the BLOG's POSTS, LOOK online, TAKE TIME to find something else!

    OK?? Thanks, Zeina

    ReplyDelete
  2. this example shows how matricies are useful in finding the total sales for a computer store in a new way

    ReplyDelete
  3. Dear Ms. Zeina,
    thanks to your blog, it was easy for me to understand what matrix is essentially about.
    i took it as a game of numbers which we have to encode in order to obtain an equation that make sense.
    those rows and columns represent each feature belonging to each/ or another category that eventually describe a word, a function... a sort of meaning.
    i find this blog interesting in reveling how matrix is relevant in our daily day life.
    even though in early phases, yet it allows s to quickly and easily perform mathematical operation via matrix just by reading this blog, which mean that matrix doesn't take long to be learned nor to be used.
    thank you for such an interesting blog.
    Joelle C Boulos, LAU.

    ReplyDelete