diff --git a/programming/exercises/plotsinewave.m b/programming/exercises/plotsinewave.m
index f2960da..25667a3 100644
--- a/programming/exercises/plotsinewave.m
+++ b/programming/exercises/plotsinewave.m
@@ -2,12 +2,12 @@ function plotsinewave(time, sine)
 % plot precomputed sinewave
 % time: vector with timepoints
 % sine: corresponding vector with sinewave 
-if time(end)-time(1) <= 1.0
-	plot(1000.0*time, sine);
+if time(end) - time(1) <= 1.0
+	plot(1000.0 * time, sine);
 	xlabel('Time [ms]');
 else
 	plot(time, sine);
 	xlabel('Time [s]');
 end
-ylim([1.2*min(sine) 1.2*max(sine)]);
+ylim([1.2 * min(sine) 1.2 * max(sine)]);
 ylabel('Sinewave');