ToSVG

SVG = Graphics.ToSVG(pl, Options) returns the text of an svg file of the Graphics object pl, a string that can be written to a file. An svg file can be opened in any web browser and in drawing programs such as Inkscape, to edit it or to turn it into a pdf.

• pl : a Graphics object, for example made by Graphics.Plot().
• Options : (optional) A table of options. Possible options are:

  • “RelativeSize” : Boolean, the svg fills the window it is shown in, for example that of a web browser, instead of having a fixed size. The plot is stretched to the shape of the window. Default value false

• SVG : a string, the text of the svg file.

The coordinates of the svg file are in units of 1/10 point, so that zooming in keeps the plot sharp. Without “RelativeSize” the file therefore has a size of ten times the page in points: the A4 page of Graphics.Plot, 297 mm by 210 mm, becomes an image of 8427 by 5959 pixels, which a browser shows at that size. Use “RelativeSize” for viewing, or give the size you want when you put the file in a document.

Transparent colors (see colors) are written as the opacity of each element. The bitmaps of color maps are embedded in the file. Texts are written with the PostScript name of their font, for example “TimesNewRomanPSMT”; a web browser that does not know that name shows the text in a font of its own.

A density of states, written as an svg file that fills the browser window. The two lines of output show the size of an svg file with and without “RelativeSize”.

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}}}})
 
-- an svg file of a fixed size, and one that fills the window it is shown in
SVG = Graphics.ToSVG(pl)
SVGRelative = Graphics.ToSVG(pl, {{"RelativeSize",true}})
print(string.match(SVG, '<svg width="[^"]*" height="[^"]*"'))
print(string.match(SVGRelative, '<svg width="[^"]*" height="[^"]*"'))
 
file = io.open("DOS.svg", "w")
file:write(SVGRelative)
file:close()

<svg width="8427" height="5959"
<svg width="100%" height="100%"

The script writes DOS.svg. See Graphics.SVGHTMLViewer() for a web page to look at svg files.