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So, this matrix...
![[ row 1: 1 , 3 , 0 row 2: -2 , 6 , 4 ]](images/01-matrices-07.gif)
has
2
rows and 3
columns.
He's called a
2 x 3
matrix.
That's read "a 2 by 3 matrix" and that's NOT a multiplication sign!
What's the size of
this matrix?
![[ row 1: 5 , 4 row 2: - 2 , 11 row 3: 0 , 3 ]](images/01-matrices-08.gif)
3
rows and 2
columns...
This is a 3 x 2
matrix.
* A
2 x 3
matrix and a 3 x 2
matrix are definitely different sizes!
This guy is a
2 x 2
matrix:
![[ row 1: 0 , -3 row 2: 2 , 10 ]](images/01-matrices-09.gif)
He's a square
matrix.
We'll be able to do
some special things with square matrices that we won't be able to do
with other sizes. (For example, we can only take determinants
of square matrices.)
Continued on the
next
page
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