ToPS

PS = Graphics.ToPS(pl) returns the text of an encapsulated PostScript (eps) file of the Graphics object pl, a string that can be written to a file. A PostScript file can be included in LaTeX, printed, or turned into a pdf, for example with ps2pdf -dEPSCrop.

• pl : a Graphics object, for example made by Graphics.Plot().

• PS : a string, the text of the PostScript file.

The coordinates of the PostScript file are in units of 1/10 point, so that zooming in keeps the plot sharp. The bounding box is therefore ten times the page: the A4 page of Graphics.Plot, 297 mm by 210 mm, has a bounding box of 8427 by 5959 points, 2.97 m by 2.10 m. Give the size you want when you include the file, for example \includegraphics[width=8cm]{DOS.ps} in LaTeX (with latex and dvips; for pdflatex turn it into a pdf first), or scale the pdf when you print it.

PostScript files do not handle transparency correctly. Use svg files for plots with transparent colors, or put a shade that should let a curve show through below the curve, as a layer under the plot. Texts are written in the font given by its PostScript name, and only the letters of ASCII are written correctly: write “Delta” rather than the Greek letter.

A density of states, written as a PostScript file. The output is the bounding box of the file.

Example.Quanty

-- the density of states of three levels, broadened by 0.2 eV
G = ResponseFunction.New({ {0, -2, 0.5, 3}, {0.3, 0.5, 0.2}, mu = 0, type = "ListOfPoles" })
pl = Graphics.Plot(G/Pi, 0.2, {{"plotRe",false}, {"Negate",true},
                   {"Frame",{{"Xmin",-4}, {"Xmax",4}, {"Ymin",-0.1}, {"Ymax",1.8}, {"FirstYTick",0}, {"dYTick",0.5}, {"YFormat","%.1f"},
                             {"XLabel","energy (eV)"}, {"YLabel","density of states"}, {"XLMargin",0.1}, {"YAxis",-10}}}})
 
-- the plot as an encapsulated PostScript file
PS = Graphics.ToPS(pl)
print(string.match(PS, "%%%%BoundingBox:[^\n]*"))
 
file = io.open("DOS.ps", "w")
file:write(PS)
file:close()

%%BoundingBox: 0 0 8427 5959

The script writes DOS.ps. ps2pdf -dEPSCrop DOS.ps turns it into DOS.pdf.