add sample data and process script

git-svn-id: https://bucket.mit.edu/svn/nilm/zoom@6331 ddd99763-3ecb-0310-9145-efcb8ce7c51f

pc/process.m

@@ -0,0 +1,8 @@
+load("data");
+x = -(data(:,1) - mean(data(:,1)));
+y = data(:,2) - mean(data(:,2));
+t = [ 1 : 133 ];
+z = x + y;
+v = 275*ones(1,length(t));
+plot(t, x(1:length(t)), t, y(1:length(t)), t, z(1:length(t)), t, v, 'g', t, -v, 'g');
+grid on;