Why my plotting curves exceed the loop index?

Why I see three plotting curves while my loop index j runs twice?

close all;
clear all;
clc;
%% ------------------------------Program-------------------------------------
z=2860:11:3135;
FOV=[1 2];
n=2;
col=['r' 'b'];
[m,~]=size(n);
lineHandles = gobjects(1,m); 
for i=1:length(FOV)
    for j=1:n
        figure (3),
        hold on
        I0= getsignal([num2str(j),'FOV_',num2str(FOV(i)),'mrad\out_resultsG_I0.dat']);
        Q0= getsignal([num2str(j),'FOV_',num2str(FOV(i)),'mrad\out_resultsG_Q0.dat']);
        I(i,:)= smooth(sum(I0,2));
        Q(i,:)= smooth(sum(Q0,2));
        dep(i,:)= (I(i,:)-Q(i,:))./(I(i,:)+Q(i,:));
        depr(i,:)=(dep(1,:)./dep(2,:));
        plot(depr(i,:),z,'LineWidth',1.5,'color',col(:,j));
        title('\fontname{Arial}Inhomogeneous clouds','Fontsize',12);
        %legend('\delta_{in}/\delta_{out}','location','Southeast');
        legend('CM1','CM2','location','Southeast');
        xlabel('Depolarization ratio \delta_{rat}');
        ylabel('\fontname{Arial}Cloud depth (m)');
        set(gca,'color','w','Fontsize',12,'LineWidth',1,'Fontweight','normal');
        set(gca,'box','off','Fontname','Arial','Fontsmoothing','on');
        set(gca,'xlim',[0 1.6],'xtick',[0:0.2:1.6],'ylim',[2850 3150],'ytick',[2850:60:3150]);
        set(gca,'xgrid','on','ygrid','on','gridcolor','k')
    end
end

Answer 1

[Sulaymon Eshkabilov]

Hi,

There might be a couple or more possible cases. Presumably (preassumption without seeing your data), one of your imported data sets contains two sets of data instead of one.

Don'r foget to use hold off as well once all done. This could be another possible case scenario.

[Wiqas Ahmad]

Thank you for your comment. I have almost solved it.