Operations With Matrices; Addition And Subtraction - HP 49g+ User Manual

Operations with matrices

Matrices, like other mathematical objects, can be added and subtracted.
They can be multiplied by a scalar, or among themselves. An important
operation for linear algebra applications is the inverse of a matrix. Details of
these operations are presented next.
To illustrate the operations we will create a number of matrices that we will
store in the following variables. Here are the matrices A22, B22, A23, B23,
A33 and B33:
In RPN mode, the steps to follow are:
{ 2 , 2 } R A N M ' A 2 2 '
`
{ 2 , 3 } R A N M ' A 2 3 '
`
{ 3 , 2 } R A N M ' A 3 2 '
`
{ 3 , 3 } R A N M ' A 3 3 '
`

Addition and subtraction

Four examples are shown below using the matrices stored above (ALG mode).
{ 2 , 2 }
` K `
{ 2 , 3 }
` K `
{ 3 , 2 }
` K `
{ 3 , 3 }
` K `
R A N M ' B 2 2 '
` K
R A N M ' B 2 3 '
` K
R A N M ' B 3 2 '
` K
R A N M ' B 3 3 '
` K
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