How do I set up Gnuplot so that the ouput will be safed to a file, what parameters influence the output.

#Title of the plotdes
set title “Verbrauchsdaten Strom und Gas”
#Title of the x-axis
set xlabel “Monat”
#Title of the y-axis
set ylabel “Strom-/Gasverbrauch in kWh”

#the x-axis is formatted as a date
set xdata time
#the data format for the x-axis data is “06/2006”
set timefmt “%m/%Y”
#the label of the x-axis shall be in the form of “Jun 06”
set format x “%b %y”
#the y-axis shall have 5 subdivisions of the main tics
set mytics 5
#on the x-axis only the months 07/2005 till 06/2006 shall be displayed
set xrange[“07/2005″:”06/2006”]
#the grid shall be behind the plotted data
set grid back
#the line width of the main grid shall be 2, of the sub grid 0,5
set grid mytics lw 2, lw .5
#for the x-axis no grid is displayed
set grid noxtics
#the data will be displayed as boxes which are 80% wide
set boxwidth 0.8 relative
#the boxes will be filled with a 25% intensity
set style fill solid .25
#the legend will be displayed left of the plot
set key left
#output to pdf file
set terminal pdf
#output file will be named “strom_und_gasverbrauch.pdf”
set output ‘strom_und_gasverbrauch.pdf’

#input data is in file “strom_und_gasverbrauch.csv”,
#for Gasverbrauch column 2 is x-axis and
# column 7 isy-axis
# in legend the plot will be described as ‘Gasverbrauch’,
# it will be display as box with color 3
# the second plot uses column 2 and 4 is labeled ‘Stromverbrauch’
# will be displayed as box and with color 1
plot\
‘strom_und_gasverbrauch.csv’ u 2:7 title ‘Gasverbrauch’ w boxes fs 3,\
‘strom_und_gasverbrauch.csv’ u 2:4 title ‘Stromverbrauch’ w boxes fs 1