how to plot by looping

i would like to ask how to plot coordinate by looping

this is beause i have some "status" to be followed when plotting,

thus im using the loop to check the status (4th column) like below:-

if it equal to 1 the marker should be in -*

if it equal to 0 the marker should be in -o red color

if none of the above, it should draw line,

but i only got the marker type only, not the "else" part

how should i able to plot the line and different type of marker base on the status at the 4th column

   cities6=[181  -12   70  2
             56  -12   80  1
            184  -12   90  2
            185  -12  100  2
            186  -12  110  2
            187   -4  110  2
            188    0  110  2
            189    4  110  2
            4    8  110  0];
  xa6=cities6(:,2);
  ya6=cities6(:,3);
  noofcities6=cities6(:,1);
  for s6=1:n6
     status6=cities6(:,4);
     labels6=cellstr(num2str(noofcities6(s6)));
     if status6(s6) == 1,
        plot(xa6(s6),ya6(s6),'-*'); 
        text(xa6(s6),ya6(s6),labels6, 'VerticalAlignment','bottom','HorizontalAlignment','right');
        hold on
     end
     if status6(s6) == 0, 
        plot(xa6(s6),ya6(s6),'-o','color','r');
        text(xa6(s6),ya6(s6),labels6, 'VerticalAlignment','bottom','HorizontalAlignment','right','color','r');        
        hold on
     else
        plot(xa6(s6),ya6(s6),'-');
     end
    hold on
  end
  grid on
  grid minor

Thank you.

Answer 1

[Thorsten]

The points are not visible because plot(xa6(s6),ya6(s6),'-'); just plots a single point that falls on the axis or the grid lines. Use

axis([-20 10 50 120])
grid off

or

plot(xa6(s6),ya6(s6),'x');

[nadhirah]

hi Thorsten, thanks for answering, i have tried your suggestion, i manage to plot the point but can't display the line connected between the points, i tried '-x' and grid off, it display x as marker, but no line.

[Thorsten]

You see no line because you plot only a single point in each plot command. To plot the line, use

plot(xa6, ya6, '-')

[nadhirah]

now i know why, thank you =)