diff -r 88a01948450d -r d33698326409 using_python_modules/four_plot.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/using_python_modules/four_plot.py	Wed Dec 01 16:51:35 2010 +0530
@@ -0,0 +1,11 @@
+x=linspace(-5*pi, 5*pi, 500)
+plot(x, x, 'b')
+plot(x, -x, 'b')
+plot(x, sin(x), 'g', linewidth=2)
+plot(x, x*sin(x), 'r', linewidth=3)
+legend(['x', '-x', 'sin(x)', 'xsin(x)'])
+annotate('origin', xy = (0, 0))
+title('Four Plot')
+xlim(-5*pi, 5*pi)
+ylim(-5*pi, 5*pi)
+#show()