diff --git a/testarrays b/testarrays
new file mode 100644
index 0000000..002d79c
--- /dev/null
+++ b/testarrays
@@ -0,0 +1,8 @@
+rand("seed",1);
+
+for i = 3:10
+  e=sort(randi(6,[i-1,1]));
+  f=sort(randi(10,[i,1]));
+  g=sort(randi(9,[i-1,1]));
+  eval(['A',int2str(i),'=diag(f)+diag(e,-1)+diag(g,1);']);
+end