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1 | -- Created on: 2005-12-15 |
2 | -- Created by: Julia GERASIMOVA |
3 | -- Copyright (c) 2005-2012 OPEN CASCADE SAS |
4 | -- |
5 | -- The content of this file is subject to the Open CASCADE Technology Public |
6 | -- License Version 6.5 (the "License"). You may not use the content of this file |
7 | -- except in compliance with the License. Please obtain a copy of the License |
8 | -- at http://www.opencascade.org and read it completely before using this file. |
9 | -- |
10 | -- The Initial Developer of the Original Code is Open CASCADE S.A.S., having its |
11 | -- main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France. |
12 | -- |
13 | -- The Original Code and all software distributed under the License is |
14 | -- distributed on an "AS IS" basis, without warranty of any kind, and the |
15 | -- Initial Developer hereby disclaims all such warranties, including without |
16 | -- limitation, any warranties of merchantability, fitness for a particular |
17 | -- purpose or non-infringement. Please see the License for the specific terms |
18 | -- and conditions governing the rights and limitations under the License. |
19 | |
7fd59977 |
20 | |
21 | class EigenValuesSearcher from math |
22 | ---Purpose: This class finds eigen values and vectors of |
23 | -- real symmetric tridiagonal matrix |
24 | |
25 | uses |
26 | |
27 | Array1OfReal from TColStd, |
28 | HArray1OfReal from TColStd, |
29 | HArray2OfReal from TColStd, |
30 | Vector from math |
31 | |
32 | raises |
33 | |
34 | NotDone from StdFail |
35 | |
36 | is |
37 | Create(Diagonal : Array1OfReal from TColStd; |
38 | Subdiagonal : Array1OfReal from TColStd) |
39 | returns EigenValuesSearcher |
40 | raises NotDone; -- if length(Subdiagonal) != length(Diagonal)-1 |
41 | |
42 | IsDone(me) |
43 | ---Purpose: Returns Standard_True if computation is performed |
44 | -- successfully. |
45 | returns Boolean from Standard; |
46 | |
47 | Dimension(me) |
48 | ---Purpose: Returns the dimension of matrix |
49 | returns Integer from Standard; |
50 | |
51 | EigenValue(me; Index : Integer from Standard) |
52 | ---Purpose: Returns the Index_th eigen value of matrix |
53 | -- Index must be in [1, Dimension()] |
54 | returns Real from Standard; |
55 | |
56 | EigenVector(me; Index : Integer from Standard) |
57 | ---Purpose: Returns the Index_th eigen vector of matrix |
58 | -- Index must be in [1, Dimension()] |
59 | returns Vector from math; |
60 | |
61 | fields |
62 | |
63 | myDiagonal : HArray1OfReal from TColStd; |
64 | mySubdiagonal : HArray1OfReal from TColStd; |
65 | |
66 | myIsDone : Boolean from Standard; |
67 | myN : Integer from Standard; |
68 | myEigenValues : HArray1OfReal from TColStd; |
69 | myEigenVectors : HArray2OfReal from TColStd; |
70 | |
71 | end EigenValuesSearcher; |