Dump the (x,y,z) coordinates of each contour to one or more output files
(or *stdout* if *template* is not given). No plotting will take place.
If *template* contains one or more of the C-format specifiers %d, %f, %c
then line segments will be written to different files; otherwise all
lines are written to the specified file (*template*). The use of the
C-format specifiers controls how many files are created and how the
contours are organized. If the float format %f is present (standard
modifications to width and precision are allowed, e.g., %f7.3f), then
the filenames will contain the contour value and lines are thus
separated into files based on a common contour value. If the integer
format %d is present (including modifications like %05d), then all
contours are written to individual segment files; if any of the other
specifiers are present they just affect the file names. Finally, if the
character format %c is present it is replaced with the letters C (for
closed) or O (for open), reflecting the nature of each contour. Any
combination of one, two, or all three modifiers are valid, resulting in
different filenames and number of files. For instance, if %c appears by
itself, then only two files are created, separating the open from the
closed contours (assuming both kinds are present). If just %f is used,
then all segments for the same contour level will be written to the same
file, resulting in *N* multi-segment files. If both %f and %c were
combined then each contour level would be further subdivided into closed
and open contours. Any combination involving %d will result in one
individual file for each segment; %c, %f only modifies the file names.
The files are ASCII unless **-bo** is used.
