[Gnuplot-info] Question from a novice: Drawing simple polygons using Cartesian coordinates

[Sarah L. <sle...@Ve...>]

I'm sure these questions are easy, but I'm brand new to gnuplot, and the documentation/demos/examples are not helpful. I ordered the book, but it won't arrive for another two days.


1.      I want to draw polygons on a graph using the vertex coordinates. The set object command is easy, but I can't figure out how to create a simple plot that just contains both polygons. If I enter

plot [1:5] x

I get a red line going through the graph. What is the best command for simply plotting the polygons I've defined using set object?


2.      Can I create a plot with no axes at all? Ideally, I would like just my polygons in the image.


3.      I would like to generate .png files. Supposely I can use

set terminal png
plot ...

And that creates a file output.png someplace, but I searched for that file, and it doesn't exist. How do I create that file?

Thanks in advance for your help,

Sarah