4/4/03

10/28/02

9/13/02

CovMatrices v1.0, cvs rtag V01-00-00

The CovMatrices package is a "lean-and-mean" set of classes representing symmetric, positive-definite matrices (and related helper classes).
The focus is on:
1. Fastest possible speed, for operations needed for tracking.
   In HEP calcullations, these involve matrices of moderate size -- the package optimized for 4x4, 5x5 and 6x6 symmetric matrices.
2. Simplicity of interface and coding
   (possibly at the expense of the level of flexibility available in other matrix packages).
Features in release:
• Specialized Symmetric Positive Definite (SPD) CovMatrices in dimensions up to 6x6.
• Highly optimized operations such as inversion.
  Performance is up to twice as fast as for CLHEP Matrix or LinearAlgebra, on these specialized matrices.
• General case class for larger SPD matrices.
• Vectors, and BiVectors for tracking through 2-D planes.
Timing Documentation
• Comparisons have been made against CLHEP/Matrix and LinearAlgebra.
Platforms checked:
Linux (GCC)
Linux (KCC)
Dependencies:
• None.
Coming:
Addidtional functionality, in the form of additional optimized operations which are time-critical for performance of Kalman-filter and related tracking codes, will be added as such needs are identified.

Parent Pages: