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jskoien / intamapInteractive

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spatial perturbation #3

Open OrdinarySK opened 2 years ago

OrdinarySK commented 2 years ago

Hello, I coded a piece of code for multi-object spatial site sampling based on the AMOSA algorithm, but I found that my spatial perturbations didn't seem right. Can you give some advice, below is my perturbation code.

` x_extent = x_extent-iter/iterationx_extent y_extent = y_extent-iter/iterationy_extent temp_pt[j,1] = curr_pt[j,1] + x_extent runif(1, -0.2, 0.2) temp_pt[j,2] = curr_pt[j,2] + y_extent runif(1, -0.2, 0.2)

    while(point.in.polygon(temp_pt[j,1], temp_pt[j,2], candidates@polygons[[1]]@Polygons[[1]]@coords[,1],
                           candidates@polygons[[1]]@Polygons[[1]]@coords[,2]) != 1){
      temp_pt[j,1] = curr_pt[j,1] + x_extent * runif(1, -0.2, 0.2)
      temp_pt[j,2] = curr_pt[j,2] + y_extent * runif(1, -0.2, 0.2)
    }

`

jskoien commented 2 years ago

Dear, I am not sure if this is really a question about the package? Although I am maintaining the package, I am not responsible for the simulated annealing. And as I cannot reproduce it (missing input data, and maybe incomplete code), I am also not able to see what kind of problem there is with the script..

Best, Jon

On Sun, 6 Mar 2022 at 08:30, OrdinarySK @.***> wrote:

Hello, I coded a piece of code for multi-object spatial site sampling based on the AMOSA algorithm, but I found that my spatial perturbations didn't seem right. Can you give some advice, below is my perturbation code.

` x_extent = x_extent-iter/iteration x_extent y_extent = y_extent-iter/iterationy_extent temp_pt[j,1] = curr_pt[j,1] + x_extent runif(1, -0.2, 0.2) temp_pt[j,2] = curr_pt[j,2] + y_extent runif(1, -0.2, 0.2)

while(point.in.polygon(temp_pt[j,1], temp_pt[j,2], ***@***.******@***.******@***.***[,1],
                       ***@***.******@***.******@***.***[,2]) != 1){
  temp_pt[j,1] = curr_pt[j,1] + x_extent * runif(1, -0.2, 0.2)
  temp_pt[j,2] = curr_pt[j,2] + y_extent * runif(1, -0.2, 0.2)
}

`

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