Result

Each of the ascii result files, the names of which are defined in input (key file), consists of a sequence of data blocks.

Each block consists of a number of records that contain two values ('x' and 'y') and it ends with a blank line.

Each block defines a contour by plot instructions as follows:

• for the first {x,y}: start to plot at that point.
• for each next {x,y}: (continue to) draw the contour to that point.
• the blank line signals the end of the contour.

The last block does not correspond to a contour, but draws a rectangle around the whole picture.