Added gnuplot scripts used to tune the 2014 drive kalman filter.

Change-Id: Icd1ae00d485b2b032a654ad584cf49d838413944
diff --git a/y2014/control_loops/drivetrain/kfplot4.gnuplot b/y2014/control_loops/drivetrain/kfplot4.gnuplot
new file mode 100644
index 0000000..d401cc6
--- /dev/null
+++ b/y2014/control_loops/drivetrain/kfplot4.gnuplot
@@ -0,0 +1,11 @@
+set term x11
+
+plot '/tmp/dump' using 1:4 title 'left_encoder',\
+     '/tmp/dump' using 1:5 title 'right_encoder',\
+     '/tmp/dump' using 1:15 title 'left_x',\
+     '/tmp/dump' using 1:16 title 'right_x',\
+     '/tmp/dump' using 1:6 title 'heading',\
+     '/tmp/dump' using 1:18 title 'kf_heading',\
+     '/tmp/dump' using 1:(($18 - $6) * 100) title 'kf_heading_error',\
+
+pause -1