Clouds of points defined on a tilt series (format)

This is the most basic format to define sets of coordinates on a tilt series.

Basic Format description

It is simply a numerical matrix, where first and second columns describe coordinates in x and y, and the third column assigns the point in a row to a tilt number. With this information, you are establishing a set of <it>unindexed observations,i.e., there is no info about which observations maybe related to each other in different tilts.

Indexed observations

If you want to assign an <it>identity to each observation, i.e., to assign an unique index to a subset of coordinates, each in a different frame, you can just add a fourth column with that index.

I/O

Clouds are simply numerical matrices; as such there is no particular extension to read and write them into disk.

Tools

There are several tools for manipulation of clouds under dpktilt.aux.clouds