Creating figures according to slice number

Hi I have data that contains slice number and coordinates. first column is slice number (changing), the last two columns are x y coordinates. I want to create figures of the coordinates with the same slice number, and once the slice number change, a new figure is generated. Could you help me? Here is what I have so far.

slice=realdata(:,3);
row=realdata(:,4);
col=realdata(:,5);
correctlength=length(slice)-1;
for i=1:correctlength
    if slice(i)==slice(i+1)
        plot(row(i),col(i))     
    end
end

Answer 1

[the cyclist]

Here is a self-contained example with some made-up data.

% Made up data with three "slices", each with a different number of points
realdata = [rand(9,2),[1;1;1;1;2;2;2;3;3],rand(9,5)];

slice=realdata(:,3);
row=realdata(:,4);
col=realdata(:,5);

correctlength=length(slice);

for i=1:correctlength
    if (i==1) || (slice(i)~=slice(i-1))
        figure
        hold on
    end
    plot(row(i),col(i),'.')     
end

[Tina]

Thank you!

[Tina]

yes the edited one worked perfectly. the first version was missing the last slice. thanks!