Add lab session 4
Handed in on 10 Nov 2020.
Change-Id: Iac2b326e564a415d56c927b1900856d55fd6b9ed
diff --git a/p4/data/mesura4_deriva.dat b/p4/data/mesura4_deriva.dat
new file mode 100644
index 0000000..1c0affb
--- /dev/null
+++ b/p4/data/mesura4_deriva.dat
@@ -0,0 +1,209 @@
+-0.01 7.994E-01
+1.00 8.146E-01
+2.00 8.290E-01
+3.00 8.434E-01
+4.00 8.569E-01
+5.00 8.700E-01
+6.00 8.831E-01
+7.00 8.955E-01
+8.00 9.077E-01
+9.00 9.195E-01
+10.00 9.308E-01
+11.00 9.423E-01
+12.00 9.532E-01
+13.00 9.637E-01
+14.00 9.738E-01
+15.00 9.841E-01
+16.00 9.939E-01
+17.00 1.004E+00
+18.00 1.013E+00
+19.00 1.022E+00
+20.00 1.031E+00
+21.00 1.039E+00
+22.00 1.048E+00
+23.00 1.056E+00
+24.00 1.064E+00
+25.00 1.072E+00
+26.00 1.080E+00
+27.00 1.088E+00
+28.00 1.095E+00
+29.00 1.102E+00
+30.00 1.109E+00
+31.00 1.116E+00
+32.00 1.123E+00
+33.00 1.130E+00
+34.00 1.137E+00
+35.00 1.143E+00
+36.00 1.149E+00
+37.00 1.156E+00
+38.00 1.162E+00
+39.00 1.168E+00
+40.00 1.174E+00
+41.00 1.181E+00
+42.00 1.186E+00
+43.00 1.193E+00
+44.00 1.198E+00
+45.00 1.204E+00
+46.00 1.210E+00
+47.00 1.216E+00
+48.00 1.221E+00
+900.00 4.097E-01
+901.00 4.065E-01
+902.00 4.035E-01
+903.00 4.003E-01
+904.00 3.973E-01
+905.00 3.942E-01
+906.00 3.908E-01
+907.00 3.876E-01
+908.00 3.847E-01
+909.00 3.815E-01
+910.00 3.787E-01
+911.00 3.757E-01
+912.00 3.725E-01
+913.00 3.696E-01
+914.00 3.661E-01
+915.00 3.634E-01
+916.00 3.601E-01
+917.00 3.574E-01
+918.00 3.546E-01
+919.00 3.514E-01
+920.00 3.483E-01
+921.00 3.454E-01
+922.00 3.425E-01
+923.00 3.393E-01
+924.00 3.363E-01
+925.00 3.335E-01
+926.00 3.306E-01
+927.00 3.277E-01
+928.00 3.247E-01
+929.00 3.219E-01
+930.00 3.192E-01
+931.00 3.163E-01
+932.00 3.132E-01
+933.00 3.103E-01
+934.00 3.073E-01
+935.00 3.046E-01
+936.00 3.019E-01
+937.00 2.991E-01
+938.00 2.962E-01
+939.00 2.936E-01
+940.00 2.909E-01
+941.00 2.880E-01
+942.00 2.852E-01
+943.00 2.826E-01
+944.00 2.797E-01
+945.00 2.768E-01
+946.00 2.741E-01
+947.00 2.714E-01
+948.00 2.686E-01
+949.00 2.658E-01
+950.00 2.634E-01
+951.00 2.605E-01
+952.00 2.579E-01
+953.00 2.552E-01
+954.00 2.524E-01
+955.00 2.500E-01
+956.00 2.473E-01
+957.00 2.444E-01
+958.00 2.420E-01
+959.00 2.397E-01
+960.00 2.369E-01
+961.00 2.346E-01
+962.00 2.316E-01
+963.00 2.293E-01
+964.00 2.265E-01
+965.00 2.240E-01
+966.00 2.217E-01
+967.00 2.190E-01
+968.00 2.165E-01
+969.00 2.142E-01
+970.00 2.116E-01
+971.00 2.092E-01
+972.00 2.066E-01
+973.00 2.040E-01
+974.00 2.018E-01
+975.00 1.989E-01
+976.00 1.967E-01
+977.00 1.941E-01
+978.00 1.918E-01
+979.00 1.892E-01
+980.00 1.869E-01
+981.00 1.844E-01
+982.00 1.823E-01
+983.00 1.797E-01
+984.00 1.773E-01
+985.00 1.748E-01
+986.00 1.730E-01
+987.00 1.705E-01
+988.00 1.679E-01
+989.00 1.654E-01
+990.00 1.631E-01
+991.00 1.609E-01
+992.00 1.584E-01
+993.00 1.560E-01
+994.00 1.539E-01
+995.00 1.516E-01
+996.00 1.494E-01
+997.00 1.468E-01
+998.00 1.446E-01
+999.00 1.423E-01
+1000.00 1.397E-01
+1001.00 1.376E-01
+1002.00 1.353E-01
+1003.00 1.330E-01
+1004.00 1.308E-01
+1005.00 1.285E-01
+1006.00 1.266E-01
+1007.00 1.242E-01
+1008.00 1.218E-01
+1009.00 1.196E-01
+1010.00 1.175E-01
+1011.00 1.151E-01
+1012.00 1.131E-01
+1013.00 1.108E-01
+1014.00 1.086E-01
+1015.00 1.066E-01
+1016.00 1.044E-01
+1017.00 1.020E-01
+1018.00 9.971E-02
+1019.00 9.763E-02
+1020.00 9.563E-02
+1021.00 9.355E-02
+1022.00 9.117E-02
+1023.00 8.920E-02
+1024.00 8.674E-02
+1025.00 8.455E-02
+1026.00 8.253E-02
+1027.00 8.046E-02
+1028.00 7.851E-02
+1029.00 7.628E-02
+1030.00 7.405E-02
+1031.00 7.218E-02
+1032.00 7.008E-02
+1033.00 6.762E-02
+1034.00 6.574E-02
+1035.00 6.336E-02
+1036.00 6.153E-02
+1037.00 5.935E-02
+1038.00 5.748E-02
+1039.00 5.500E-02
+1040.00 5.292E-02
+1041.00 5.111E-02
+1042.00 4.899E-02
+1043.00 4.697E-02
+1044.00 4.469E-02
+1045.00 4.284E-02
+1046.00 4.067E-02
+1047.00 3.857E-02
+1048.00 3.674E-02
+1049.00 3.428E-02
+1050.00 3.237E-02
+1051.00 3.044E-02
+1052.00 2.828E-02
+1053.00 2.626E-02
+1054.00 2.443E-02
+1055.00 2.227E-02
+1056.00 2.011E-02
+1057.08 1.817E-02
+1058.08 1.588E-02
+1059.08 1.399E-02