diff --git a/tutorial/lisa2010/rrd-by-example/ex/RPN-grad-a.pdf b/tutorial/lisa2010/rrd-by-example/ex/RPN-grad-a.pdf
new file mode 100644 (file)
index 0000000..447f853
Binary files /dev/null and b/tutorial/lisa2010/rrd-by-example/ex/RPN-grad-a.pdf differ
index 0000000..447f853
Binary files /dev/null and b/tutorial/lisa2010/rrd-by-example/ex/RPN-grad-a.pdf differ