Save coordinates in an array

Hi,

I am itereting two loops, in order to form coordinates.

I am trying to save them with this line, because I want to keep it in an array.

[idx_x, idx_y] = [[idx_x, idx_y] ;[xi, yi] ];

xi and yi are the indexes of the loop.

for yi=1:mapa.ylength
        for xi=1:mapa.xlength
            if mapa.img(xi,yi,1) == 0
               at(xi,yi) = at(xi,yi) + 20;%+ 26;
               alturas(xi,yi) = mapa.buildingHeight;
           else 
               alturas(xi,yi) = Movel.Altura;
            end
           
           [idx_x, idx_y] = [[idx_x, idx_y] ;[xi, yi] ];
           heights = [heights; alturas(xi,yi)];
        end
    end

How can I do this?

Thanks!

Answer 1

[Walter Roberson]

idx_x(end+1) = xi;
idx_y(end+1) = yi;