Matrix Array of elements
Describe size of a matrix using N of rows and
columns
square matrix N of rows and columns are the
same
zero matrix all elements are zero
identity matrix square matrix where
elements on the leading diagonal
e9 toplefts are all9 and all other
e p elements 0
are
denoted of
I where he describes size
When or subtracting matrices
adding
add or subtract corresponding elements
You can only add or subtract matrices
that are the same size
additively comfortable
, s C dy f
l Cs L's
When multiplying a matrix by a scalar
multiply every element by that scalar
Eg A 3 find 2A
At A
4 3 L 2A
Matrixnaultiplication
Matrices can be multiplied together if
N ofcolumns in est matrix Nsfrows in 2ndmatrix
Theproduct matrix will
have
same N'ofrows as Pst matrix and same
N of columns as 2nd matrix
AB C A n T
usetonbe.mgYfgipeHcativeh Be.m
xk
e i n XK
AB BA
Describe size of a matrix using N of rows and
columns
square matrix N of rows and columns are the
same
zero matrix all elements are zero
identity matrix square matrix where
elements on the leading diagonal
e9 toplefts are all9 and all other
e p elements 0
are
denoted of
I where he describes size
When or subtracting matrices
adding
add or subtract corresponding elements
You can only add or subtract matrices
that are the same size
additively comfortable
, s C dy f
l Cs L's
When multiplying a matrix by a scalar
multiply every element by that scalar
Eg A 3 find 2A
At A
4 3 L 2A
Matrixnaultiplication
Matrices can be multiplied together if
N ofcolumns in est matrix Nsfrows in 2ndmatrix
Theproduct matrix will
have
same N'ofrows as Pst matrix and same
N of columns as 2nd matrix
AB C A n T
usetonbe.mgYfgipeHcativeh Be.m
xk
e i n XK
AB BA
