Build gradient

C++ code to build environmental gradients

product_environmental_matrix(gradientlim, length)

Arguments

gradientlim	double. Environmental gradient size
length	int. Number of cells

Examples

product_environmental_matrix(10, 10)
#>             [,1]       [,2]      [,3]       [,4]       [,5]       [,6]
#>  [1,]  100.00000  77.777778  55.55556  33.333333  11.111111 -11.111111
#>  [2,]   77.77778  60.493827  43.20988  25.925926   8.641975  -8.641975
#>  [3,]   55.55556  43.209877  30.86420  18.518519   6.172840  -6.172840
#>  [4,]   33.33333  25.925926  18.51852  11.111111   3.703704  -3.703704
#>  [5,]   11.11111   8.641975   6.17284   3.703704   1.234568  -1.234568
#>  [6,]  -11.11111  -8.641975  -6.17284  -3.703704  -1.234568   1.234568
#>  [7,]  -33.33333 -25.925926 -18.51852 -11.111111  -3.703704   3.703704
#>  [8,]  -55.55556 -43.209877 -30.86420 -18.518519  -6.172840   6.172840
#>  [9,]  -77.77778 -60.493827 -43.20988 -25.925926  -8.641975   8.641975
#> [10,] -100.00000 -77.777778 -55.55556 -33.333333 -11.111111  11.111111
#>             [,7]      [,8]       [,9]      [,10]
#>  [1,] -33.333333 -55.55556 -77.777778 -100.00000
#>  [2,] -25.925926 -43.20988 -60.493827  -77.77778
#>  [3,] -18.518519 -30.86420 -43.209877  -55.55556
#>  [4,] -11.111111 -18.51852 -25.925926  -33.33333
#>  [5,]  -3.703704  -6.17284  -8.641975  -11.11111
#>  [6,]   3.703704   6.17284   8.641975   11.11111
#>  [7,]  11.111111  18.51852  25.925926   33.33333
#>  [8,]  18.518519  30.86420  43.209877   55.55556
#>  [9,]  25.925926  43.20988  60.493827   77.77778
#> [10,]  33.333333  55.55556  77.777778  100.00000