diff --git a/math/gnuplot/README.md b/math/gnuplot/README.md
new file mode 100644
index 0000000..6eed814
--- /dev/null
+++ b/math/gnuplot/README.md
@@ -0,0 +1,5 @@
+You might have to run
+
+`sudo apt-get install gnuplot`
+
+first.
diff --git a/math/gnuplot/draw-csv/README.md b/math/gnuplot/draw-csv/README.md
index 08e0171..3232f8f 100644
--- a/math/gnuplot/draw-csv/README.md
+++ b/math/gnuplot/draw-csv/README.md
@@ -8,6 +8,8 @@ Syntax: `plot 'data.csv' every::1::7  using 1:2 with boxes`
 * `using 1:2`: use first and second column
 * `with boxes`: can also be `lines` or `vectors head size 0.1,20,60 filled lc palette`
 
+![Example](draw-csv.png)
+
 Examples
 --------
 * http://www.gnuplotting.org/tag/data/
diff --git a/math/gnuplot/draw-csv/draw-csv.png b/math/gnuplot/draw-csv/draw-csv.png
new file mode 100644
index 0000000..fa2cce2
Binary files /dev/null and b/math/gnuplot/draw-csv/draw-csv.png differ
diff --git a/math/gnuplot/draw-csv/plot.gnuplot b/math/gnuplot/draw-csv/plot.gnuplot
index 33a5abc..e5a5a49 100644
--- a/math/gnuplot/draw-csv/plot.gnuplot
+++ b/math/gnuplot/draw-csv/plot.gnuplot
@@ -1,4 +1,4 @@
 set terminal latex
 set output "plot-tmp.tex"
 set datafile separator "," 
-plot 'data.csv' every::1::7  using 1:2:3:4 with vectors head size 0.1,20,60 filled lc palette
+plot 'data.csv' every::1::7  using 1:2:3:4 with vectors