obspectrophore man page

obspectrophore — SPECTROPHORE calculator


obspectrophore [options] -i input_file

obspectrophore [-u | -h]


obspectrophore can be used to generate Spectrophores, which are one-dimensional descriptors generated from the property fields surrounding the molecules. This technology allows the accurate description of molecules in terms of their surface properties or fields. Comparison of molecules property fields provides a robust structure-independent method of aligning actives from different chemical classes. When applied to molecules such as ligands and drugs, Spectrophores can be used as powerful molecular descriptors in the fields of chemoinformatics, virtual screening, and QSAR modeling.


-i file

Specifies the molecular input file from which Spectrophores are to be calculated. The filetype is automatically detected from the file extension.

-n value

Specifies the kind of normalization that should be performed. Valid values are (without quotes): No (default), ZeroMean, UnitStd and ZeroMeanAndUnitStd.

-a value

Specifies the required accuracy expressed as the angular stepsize. Only the following discrete values are allowed: 1 | 2 | 5 | 10 | 15 | 20 (default) | 30 | 36 | 45 | 60

-s value

Specifies the kind of cages that should be used in terms of the underlying pointgroup: P1 or P-1. Valid values are (without quotes): No (default), Unique, Mirror and All.

-r value

Specifies the required resolution expressed as a real positive number. The default value is 3.0 Angstrom. Negative values or a value equal to 0 generate an error message.


Display implementation details.


Display help message.

See Also


The web pages for Open Babel can be found at: < http://openbabel.org/>


Open Babel is developed by a cast of many, including currrent maintainers Geoff Hutchison, Chris Morley, Michael Banck, and innumerable others who have contributed fixes and additions. For more contributors to Open Babel, see < http://openbabel.org/wiki/THANKS>


June 2, 2012