diff --git a/Utils/scripts/histTime.gnu b/Utils/scripts/histTime.gnu
new file mode 100644
index 0000000000000000000000000000000000000000..420657a165a7e65942e66359e789b6098388dfd9
--- /dev/null
+++ b/Utils/scripts/histTime.gnu
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+#
+#  used to plot the histogram of particles
+#  Read output.txt generated by statisticsOnOctree
+#  output the histogram in Histogram.eps file 
+#
+clear
+reset
+set key off
+set border 3
+# Add a vertical dotted line at x=0 to show centre (mean) of distribution.
+#set yzeroaxis
+#
+#
+#
+set title "Time comparaison for unitsphere distribution
+set ylabel "Time (s)"
+set xlabel "Number of core"
+#
+# OUTPUT
+#set terminal postscript enhanced color  'Helvetica' 20
+set terminal postscript enhanced color "times-roman,24"
+set output 'HistogramTime.eps'
+#
+#   PLOT
+#
+set style data histograms
+set style histogram rowstacked
+
+#set style histogram cluster gap 1
+#unset ytics
+set boxwidth 0.75
+set style fill solid 1.0 border
+
+set xtics border ("4" 0, "8" 1, "12" 2, "16" 3, "20" 4, "24" 5)
+#plot  "RES-Cheb-openmp-unitsphere-basic.out"  using 3 t "P2P", "" using 4 lc 4 t "M2L" , "" using ($2-$4-$3) lc 5 t "Remain operators"
+plot  "RES-Cheb-openmp-unitsphere-basic.out"  using 3, "" using 4 lc 4 , "" using ($2-$4-$3) lc 5