How to draw 2D diagram in linux

Question

I have a .txt file contatning points which is look like following:

##x1 y1 x2 y2
123 567 798 900
788 900 87  89
....

I want to draw 2D diagram

Answer 1

You can also do this using rsvg-convert (from librsvg) or svg2png. Both of those programs expect an inout file in SVG format and render it as a PNG file. So you would need to convert your

123 567 798 900
788 900 87  89

into this type of thing

That can be done easily enough with a little awk script like this:

awk '
   BEGIN{ printf("\n") }' points.txt

You can then pump the output of that into either of the two programs I mentioned above:

awk ... | rsvg-convert -b \#ffff00 > result.png