diff --git a/examples/update.cpp b/examples/update.cpp
new file mode 100644
index 0000000..64f4906
--- /dev/null
+++ b/examples/update.cpp
@@ -0,0 +1,60 @@
+#define _USE_MATH_DEFINES
+#include <cmath>
+#include "../matplotlibcpp.h"
+#include <chrono>
+
+namespace plt = matplotlibcpp;
+
+void update_window(const double x, const double y, const double t,
+                   std::vector<double> &xt, std::vector<double> &yt)
+{
+    const double target_length = 300;
+    const double half_win = (target_length/(2.*sqrt(1.+t*t)));
+
+    xt[0] = x - half_win;
+    xt[1] = x + half_win;
+    yt[0] = y - half_win*t;
+    yt[1] = y + half_win*t;
+}
+
+
+int main()
+{
+    size_t n = 1000;
+    std::vector<double> x, y;
+
+    const double w = 0.05;
+    const double a = n/2;
+
+    for (size_t i=0; i<n; i++) {
+        x.push_back(i);
+        y.push_back(a*sin(w*i));
+    }
+
+    std::vector<double> xt(2), yt(2);
+
+    plt::title("Tangent of a sine curve");
+    plt::xlim(x.front(), x.back());
+    plt::ylim(-a, a);
+    plt::axis("equal");
+
+    // Plot sin once and for all.
+    plt::named_plot("sin", x, y);
+
+    // Prepare plotting the tangent.
+    plt::Plot plot("tangent");
+
+    plt::legend();
+
+    for (size_t i=0; i<n; i++) {
+        if (i % 10 == 0) {
+            update_window(x[i], y[i], a*w*cos(w*x[i]), xt, yt);
+
+            // Just update data for this plot.
+            plot.update(xt, yt);
+
+            // Small pause so the viewer has a chance to enjoy the animation.
+            plt::pause(0.1);
+        }
+   }
+}