Numerical and Symbolic Product

Elementwise product of numeric or character arrays.

x %prod% y

Arguments

x

numeric or character array.

y

numeric or character array.

Value

array.

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

See also

Other basic arithmetic: %diff%(), %div%(), %dot%(), %inner%(), %kronecker%(), %outer%(), %sum%()

Examples

### vector 
x <- c("a+1","b+2")
x %prod% x
#> [1] "(a+1) * (a+1)" "(b+2) * (b+2)"

### matrix 
x <- matrix(letters[1:4], ncol = 2)
x %prod% x
#>      [,1]        [,2]       
#> [1,] "(a) * (a)" "(c) * (c)"
#> [2,] "(b) * (b)" "(d) * (d)"

### array
x <- array(letters[1:12], dim = c(2,2,3))
y <- array(1:12, dim = c(2,2,3))
x %prod% y
#> , , 1
#> 
#>      [,1]      [,2]     
#> [1,] "(a) * 1" "(c) * 3"
#> [2,] "(b) * 2" "(d) * 4"
#> 
#> , , 2
#> 
#>      [,1]      [,2]     
#> [1,] "(e) * 5" "(g) * 7"
#> [2,] "(f) * 6" "(h) * 8"
#> 
#> , , 3
#> 
#>      [,1]       [,2]      
#> [1,] "(i) * 9"  "(k) * 11"
#> [2,] "(j) * 10" "(l) * 12"
#>