Add coordinate points to a grid
1 Ansicht (letzte 30 Tage)
Ältere Kommentare anzeigen
Vanessa
am 25 Jul. 2015
Kommentiert: Vanessa
am 26 Jul. 2015
Hi, I need help. Im trying to create a grid (map of a ground) 200m x 300m and then I need to add some points in the grid. I have the coordinates of the points, but I dont know how to do it. I did the grid with the command [X,Y]= meshgrid() but it created a grid with lines, not an empty grid. So, I need an empty grid in which I can add the points. Thanks so much, Vanessa
2 Kommentare
Akzeptierte Antwort
Image Analyst
am 26 Jul. 2015
Why can't you just do
% Create empty grid. No lines at all, or any points at all.
myGrid = zeros(rows, columns);
% You say you have existing coordinates already.
% Let's assume they are in arrays called x and y
% and have values that correspond to rows and columns.
% Place them in the grid with a value of 1
for k = 1 : length(x)
myGrid(y(k), x(k)) = 1;
end
2 Kommentare
Image Analyst
am 26 Jul. 2015
To find out which are within a distance of 5 from some other point (x0, y0):
distances = sqrt((x-x0).^2 + (y-y0).^2);
% Get a logical index array of those elements within 5
within5 = distances < 5;
% Now "evaluate how many of these points are around
% (e.g. radius of 5 meters) to a specific point."
howMany = sum(within5);
I think this should get you what you asked for.
Weitere Antworten (0)
Siehe auch
Kategorien
Mehr zu Computational Geometry finden Sie in Help Center und File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!