Results 1 to 2 of 2

Math Help - Pattern Analysis

  1. #1
    Junior Member
    Joined
    Dec 2009
    Posts
    30

    Pattern Analysis

    Basically ive answered part 1a but i dont understand why if Σ12 = Σ21 = 2 it shows that Σ is called the covariance matrix.

    However in a 3x3 matrix like [1 2 3
    7 8 9
    6 5 4]
    where all the numbers are different how would i determine the covariance in this case,would i put in the form 7(Σ12)=2(Σ21)=14 or isnt it valid in this case
    Attached Thumbnails Attached Thumbnails Pattern Analysis-q1.jpg  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by asingh88 View Post
    Basically ive answered part 1a but i dont understand why if Σ12 = Σ21 = 2 it shows that Σ is called the covariance matrix.

    However in a 3x3 matrix like [1 2 3
    7 8 9
    6 5 4]
    where all the numbers are different how would i determine the covariance in this case,would i put in the form 7(Σ12)=2(Σ21)=14 or isnt it valid in this case
    This is very confused. A covariance matrix has to be symmetric, just look at the definition. Symmetry is a result of multiuplication being comutative.

    CB
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. What pattern is this? add 7 or 17
    Posted in the Algebra Forum
    Replies: 2
    Last Post: August 24th 2008, 05:30 PM
  2. Help with pattern
    Posted in the Math Topics Forum
    Replies: 3
    Last Post: March 15th 2007, 05:33 PM
  3. Pattern
    Posted in the Algebra Forum
    Replies: 1
    Last Post: February 26th 2007, 05:27 PM
  4. Pattern?
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: February 25th 2007, 09:19 PM
  5. Pattern
    Posted in the Math Topics Forum
    Replies: 2
    Last Post: May 18th 2005, 09:54 PM

Search Tags


/mathhelpforum @mathhelpforum