matlab - Plot more curves in one graph -

i plot more curves in 1 window , want see superposing curves.. concretely plot rho_start 3 curves in 1 window. don´t know how write in code. here it:

clear,clc,close  abc='abc'; cal=18/230;  results=[];   data=[]; i=1:3     im=imread(['vz_' num2str(j) abc(i) '.jpg']);     im=imresize(im,0.5);     %figure,imshow(im)     i=rgb2gray(im);     %figure,imshow(i);     j=imadjust(i);     %figure,imshow(j);     t=graythresh (j);     bw=im2bw(j,t);     %figure,imshow(bw);     bwi=1-bw;     %figure,imshow(bwi);     b=imclearborder(bwi);     o=bwareaopen(b,40000);     h=imfill(o,'holes');     l=bwlabel(h);     s=regionprops(l,'area','perimeter');     se=[0 1 0;1 1 1;0 1 0];     %figure,imshow(h);     d=imdilate(h,se);     e=edge(d,'canny');     %imshow(e);     bound=bwboundaries(e);     %figure,imshow(e);hold on;     k=1         b=bound{k};         %plot(b(:,2),b(:,1),'r','linewidth',1.5);     end     x=1:numel(s)         %plot(s(x).centroid(1),s(x).centroid(2),'ro');     end     xx=b(:,2);     yy=b(:,1);     %figure,plot(xx,yy);axis equal;     xx=xx-mean(xx);     yy=yy-mean(yy);     theta=xx;     rho=yy;     %figure,plot(xx,yy);axis equal;     [theta,rho]=cart2pol(xx,yy);     %figure,polar(theta,rho);     %figure,plot(theta);     %figure,plot(rho);     rho_smooth=smooth(rho,30);     [mc,xc]=min(rho_smooth);     *rho_start* =[rho_smooth(xc:size(rho_smooth));rho_smooth(1:xc)];     tc=1:length(rho_start);     [~,locsc]=findpeaks(rho_start,'minpeakheight',160,'minpeakdistance',50);     figure;hold on;     plot(tc,rho_start);     plot(locsc,rho_start(locsc),'rv','markerfacecolor','r');     grid on;     title('number of peaks');     xlabel('angle');     ylabel('radius');     data=[data; (s.area)*cal^2 (s.perimeter)*cal]; end data as=mean(data(:,2)); results=[results; j as]; end 

to plot more things in same axes use hold on :

figure; hold on; plot(1:10,1:10); plot(1:5,:2:6); 

to plot more 1 axes in each plot use subplot

figure; subplot(121) plot(1:10,1:10); subplot(122) hold on plot(1:10,1:10); plot(1:5,:2:6);