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

• `%mx%`: binary operator.

### References

Guidotti, E. (2020). "calculus: High dimensional numerical and symbolic calculus in R". https://arxiv.org/abs/2101.00086

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 0.3.1 Index]