I am looking for a graphing tool that can generate Cartesian (or polar, etc.) plots by the user actually clicking on the graph itself. For example, I am presented with a blank x-y graph. I click on an empty space, and a point is created there.
The purpose of this is to create simple graphs that illustrate a relationship of different types (linear, asymptotic, etc.). I don't care that the points wouldn't be 'exact'; a bit of scatter would actually be advantageous for my purposes. As output, I'd like a vector graphics file, but raster will work in a pinch.
As an edit, here's a quick run-down of some features I'd like.
- No need to manually create axes; they're just there. (Required)
- Easily adjust look or shape of the points. (Required)
- Connect the points by a smooth line if I so wish. (Not required)
- Export as vector graphics. (Not required)
- Ability to snap the points to a grid. (Not required)
Either OS X or Windows would be fine.