Concatenate two or more COORDS sets.
catcrd <crd1> <crd2> ... name <name>
<crdX> COORDS data sets to concatenate, specify 2 or more.
name <name> New COORDS set name.
Concatenate two or more COORDS data sets into a single COORDS data set. The topologies must have the same number of atoms for this to work. If the topologies differ in other ways, the topology of the rst COORDS set takes priority.