1 Resolution in PMI {#pmi_resolution}
4 Very generally, the _representation_ of a system is defined by all the
5 variables that need to be determined based on input information, including
6 the assignment of the system components to geometric objects (e.g. points,
7 spheres, ellipsoids, and 3D Gaussian density functions). It is common to use
8 a multiscale representation, where the system is represented
using several
9 resolution scales simultaneously. The spatial restraints will be applied
10 to individual resolution scales as appropriate (
for example, a cross-link
11 may be applied at residue resolution,
while an excluded volume restraint
12 may act on a more coarse representation of the system, such as a spherical
13 bead representing multiple residues).
15 In PMI, the _resolution_ of a representation is simply the number of residues
16 per spherical bead. For example, resolution 10 represents the system
using
17 a bead
for every 10 residues,
while resolution 1 uses a bead
for each residue.
18 An all-atom representation is assigned a resolution of 0.
20 Many PMI functions take a `resolution` parameter to specify which resolution
21 to act on. These functions will use the closest resolution
if the exact
22 resolution requested is not available.
25 of all system representations at the desired resolutions.
A decorator for a representation.