Draw color-coded lines in image.

LINES2IM generates an image with painted lines. The line-hues are the angles of the slopes.

Given a set of line coordinates:
X = [startx1 endx1; startx2 endx2;...]
Y = [starty1 endy1; starty2 endy2;...]
and a wanted image resolution, this code will generate the sparse matrix HUE, and the images BW, RGB and HSV, all with the desired resolution.
I made this to simplify edge-analysis of image-edge-lines gained from hough-transformation. (But you could also paint with it, as I did when making the screen-shot.)