mx {calculus} R Documentation

## Numerical and Symbolic Matrix Product

### Description

Multiplies two numeric or character matrices, if they are conformable. If one argument is a vector, it will be promoted to either a row or column matrix to make the two arguments conformable. If both are vectors of the same length, it will return the inner product (as a matrix).

### Usage

mx(x, y)

x %mx% y


### Arguments

 x numeric or character matrix. y numeric or character matrix.

### Value

matrix.

### Functions

• x %mx% y: binary operator.

### References

Guidotti E (2022). "calculus: High-Dimensional Numerical and Symbolic Calculus in R." Journal of Statistical Software, 104(5), 1-37. doi:10.18637/jss.v104.i05

Other matrix algebra: mxdet(), mxinv(), mxtr()

### Examples

### numeric inner product
x <- 1:4
mx(x, x)

### symbolic inner product
x <- letters[1:4]
mx(x, x)

### numeric matrix product
x <- letters[1:4]
y <- diag(4)
mx(x, y)

### symbolic matrix product
x <- array(1:12, dim = c(3,4))
y <- letters[1:4]
mx(x, y)

### binary operator
x <- array(1:12, dim = c(3,4))
y <- letters[1:4]
x %mx% y



[Package calculus version 1.0.1 Index]