Create a certain number of agents at certain cycles and certain position due to loaded matrix
Benjamin Mewes
as my model is developing right now, I want to ask for your opinion on how to set it up:
Problem:
After the initialisation of the model (which works) I want to create agents in a certain manner:
1. at give timesteps I want to load an ascii grid which contain certain patterns where agents appear
2. as long as a grid is loaded (for example from timestep 100 to timestep 200) I want to create agents on the positions given by the ascii grid
The grid is set up with the same spatial resolution as the loaded grid. Do you have recommendatios how to implement these functions without stressing memory and the CPU?
Thanks for advice!
Patrick Taillandier
matrix new_agents <- matrix (csv_file("../includes/my_files.csv"));
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Benjamin Mewes
okay, just I thought :) Fine!
From a performance point of view: Where should I declare:
reflex create_newAgents
It is part of global{} but not in the init but as a normal reflex, or is there another clean solution?
Benjamin Mewes
I loaded the matrix as a global matrix. Imagine the dimensions are the same with the grid. Now I want to create N agents where the matrix value N > 0. How would I do that?
Am Freitag, 30. Oktober 2015 15:18:31 UTC+1 schrieb Patrick Taillandier:
Patrick Taillandier
model createfrommatrix
global {
init {
matrix new_agents <- create_a_matrix();
loop i from: 0 to: new_agents.rows -1{
loop j from: 0 to: new_agents.columns -1 {
int val <- int(new_agents[i,j]);
if (val > 0) {
cell my_cell <- cell[i,j];
create dummy number: val {
location <- any_location_in(my_cell);
}
}
}
}
}
matrix create_a_matrix {
matrix mat <- 0 as_matrix {10,10};
loop i from: 0 to: mat.rows - 1{
loop j from: 0 to: mat.columns -1 {
mat[i,j] <- rnd(3);
}
}
write mat;
return mat;
}
}
species dummy {
aspect default {draw circle(0.5) color: #red;}
}
grid cell width: 10 height: 10 ;
experiment createfrommatrix type: gui {
output {
display map {
grid cell lines: #black;
species dummy;
}
}
}