diff --git a/exo4/ising.m b/exo4/ising.m
index 1078573..6f6a46d 100644
--- a/exo4/ising.m
+++ b/exo4/ising.m
@@ -1,22 +1,30 @@
 img = cell(3,1);
 
 img{1} = compressor(imread('files2/Fig1.png'), 1);
 img{2} = compressor(imread('files2/Fig2.png'), 1);
 img{3} = compressor(imread('files2/Fig3.png'), 1);
 
+N = 50; % compression
+
 figure
 
 ax1 = axes;
 ax1.YScale = 'log';
 
 hold(ax1, 'on')
 for i = 1:3
-    fig = img{i};
     semilogy(1:img{i}.n(), img{i}.sing{1})
 end
 hold(ax1, 'off')
 
 grid on
 xlabel('N')
 ylabel('sigma')
 legend('Fig 1', 'Fig 2', 'Fig 3')
+
+
+for i = 1:3
+    figure
+    imshow(img{i}.compress(N));
+end
+