how can i draw some points but diferent colors depends of a condition?

while n<= l
    
    if 0<d(p)<=10
        h=images.roi.Point(gca,'Position',[x(n) y(n)],'Color','b');
    elseif 10<d(p)<= 20
        h=images.roi.Point(gca,'Position',[x(n) y(n)],'Color','y');
    elseif 30<d(p)<= 40
        h=images.roi.Point(gca,'Position',[x(n) y(n)],'Color','m');
    else
        h=images.roi.Point(gca,'Position',[x(n) y(n)],'Color','g');
    end
    p=p+1;
    n=n+1;    
end

thats the code basicly, i wanna draw the point of a specific color if the distance between 2 points are between 0 and 10, for example this point should be blue.

continue the cycle we check de distance from the next point, to know whats the distance and draw it with the respect color.

currently the issue is every point is blue, because its the first condition, if i change this blue for another color then all points will be of this color, it seems like only takes the first one.

if someone can help please :(

Answer 1

[Walter Roberson]

if 0<d(p)<=10

MATLAB interprets that as

if ((0<d(p))<=10)

The first comparison is made, 0<d(p) giving you a response of 0 (false) or 1 (true). Then that 0 or 1 is compared to 10 -- and since both 0 and 1 are <= 10, the result is always true.

[Erick Guzman]

thanks, you answer open my mind but you dont tell me how do it literally hahahha.

thanks so much.

i do it with:

if (dm(p)<=10)

h1=images.roi.Point(gca,'Position',[x(n) y(n)],'Color','g');

elseif (10<dm(p) && dm(2)<= 20)

h1=images.roi.Point(gca,'Position',[x(n) y(n)],'Color','y');

elseif (20<dm(p) && dm(2)<= 30)

h1=images.roi.Point(gca,'Position',[x(n) y(n)],'Color','b');

else

h1=images.roi.Point(gca,'Position',[x(n) y(n)],'Color','b');

end