A trajectory is an ordered series of atomic coordinate sets, or “frames,” opened as a single model. Although the coordinate sets are in a specific order, the data need not be a time series; for example, it could be an ensemble for which the order is not meaningful. Only one frame of a trajectory is shown at a time. Different frames can be shown or played back sequentially with the coordset command, or interactively with a slider interface. A multi-model file in mmCIF or PDB format can be opened as a trajectory by using the command open with coordsets true (default false). A trajectory can also be read from any of several trajectory formats or created with the morph command, and saved to a file with save. The number of coordinate sets in a trajectory can be reported with the command info. See also: crosslinks histogram
A model series is an ordered series of models. A model series can be played back with the mseries command or the associated slider interface.
A volume series is an ordered series of volume data sets (maps). The maps in a single series must be of the same size (number of grid points in each dimension). Volume data can be opened as a series with open, employing filename wildcard symbols or globbing as needed to specify multiple files in a single command; 3D TIFF images and Chimera map files containing five or more same-sized maps are automatically treated as series, if possible, whereas other sets of same-sized maps can be designated as series with the vseries option of open. Volume series can be played back with the vseries command or the associated slider interface.