====== MultiplyByEnergy ======

###
If //G// is a spectra object then //G.MultiplyByEnergy()// Multiplies a spectrum //G($\omega$)// by its energy, i.e. //G<sub>new</sub>($\omega$) = $\omega\times$G($\omega$)//. //G.MultiplyByEnergy// is similar to the function [[documentation:language_reference:objects:spectra:functions:multiplybyenergy|Spectra.MultiplyByEnergy]] with the difference that it does not make a copy of the spectra object.
###

===== Example =====

###
Take the spectrum defined in the file [[documentation:language_reference:objects:spectra:start|definitions.Quanty]] and multiply it with its energy.
###

==== Input ====

<code Quanty Example.Quanty>
dofile("definitions.Quanty")
 
G.Print({{"file","Spectra.dat"}})
G.MultiplyByEnergy()
G.Print({{"file","Spectra.MultiplyByEnergy.dat"}})
 
 
gnuplotScript = gnuplotHead .. [[
set output "Spectra.MultiplyByEnergy.ps"
plot "Spectra.dat"  using 1:(-$3  ) title 'T1' with lines ls  1,\
     "Spectra.MultiplyByEnergy.dat"  using 1:(-$3) title 'T1 * Energy' with lines ls  2
]]
 
file = io.open("Spectra.MultiplyByEnergy.gnuplot", "w")
file:write(gnuplotScript)
file:close()
 
os.execute("gnuplot Spectra.MultiplyByEnergy.gnuplot")
os.execute("convert -density 1024 Spectra.MultiplyByEnergy.ps -resize 1024 Spectra.MultiplyByEnergy.png")
</code>

==== Result ====
The resulting picture is:

{{:documentation:language_reference:objects:spectra:methods:spectra.multiplybyenergy.png?nolink |}}


===== Available functions =====
{{indexmenu>../functions/#1}}

===== Available methods =====
{{indexmenu>.#1}}