Add lab session 4

Handed in on 10 Nov 2020.

Change-Id: Iac2b326e564a415d56c927b1900856d55fd6b9ed
diff --git a/p4/graphs/generate.bash b/p4/graphs/generate.bash
new file mode 100644
index 0000000..b53e10b
--- /dev/null
+++ b/p4/graphs/generate.bash
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+mkdir -p ../output
+
+for i in 1 2 3 4 5; do
+  ./graph.gnu "../data/mesura${i}.dat" "../data/mesura${i}_deriva.dat" "../output/mesura${i}" "../output/mesura${i}_wd"
+done
+
+./finalgraph.gnu