| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /* | ||
| 2 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 3 | SLEPc - Scalable Library for Eigenvalue Problem Computations | ||
| 4 | Copyright (c) 2002-, Universitat Politecnica de Valencia, Spain | ||
| 5 | |||
| 6 | This file is part of SLEPc. | ||
| 7 | SLEPc is distributed under a 2-clause BSD license (see LICENSE). | ||
| 8 | - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - | ||
| 9 | */ | ||
| 10 | |||
| 11 | static char help[] = "Test rational function.\n\n"; | ||
| 12 | |||
| 13 | #include <slepcfn.h> | ||
| 14 | |||
| 15 | 10 | int main(int argc,char **argv) | |
| 16 | { | ||
| 17 | 10 | FN fn; | |
| 18 | 10 | PetscInt i,na,nb; | |
| 19 | 10 | PetscScalar x,y,yp,p[10],q[10],five=5.0,*pp,*qq; | |
| 20 | 10 | char strx[50],str[50]; | |
| 21 | |||
| 22 |
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10 | PetscFunctionBeginUser; |
| 23 |
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10 | PetscCall(SlepcInitialize(&argc,&argv,NULL,help)); |
| 24 |
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10 | PetscCall(FNCreate(PETSC_COMM_WORLD,&fn)); |
| 25 | |||
| 26 | /* polynomial p(x) */ | ||
| 27 | 10 | na = 5; | |
| 28 | 10 | p[0] = -3.1; p[1] = 1.1; p[2] = 1.0; p[3] = -2.0; p[4] = 3.5; | |
| 29 |
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10 | PetscCall(FNSetType(fn,FNRATIONAL)); |
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10 | PetscCall(FNRationalSetNumerator(fn,na,p)); |
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10 | PetscCall(FNView(fn,NULL)); |
| 32 | 10 | x = 2.2; | |
| 33 |
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10 | PetscCall(SlepcSNPrintfScalar(strx,sizeof(strx),x,PETSC_FALSE)); |
| 34 |
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10 | PetscCall(FNEvaluateFunction(fn,x,&y)); |
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10 | PetscCall(FNEvaluateDerivative(fn,x,&yp)); |
| 36 |
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10 | PetscCall(SlepcSNPrintfScalar(str,sizeof(str),y,PETSC_FALSE)); |
| 37 |
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10 | PetscCall(PetscPrintf(PETSC_COMM_WORLD," f(%s)=%s\n",strx,str)); |
| 38 |
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10 | PetscCall(SlepcSNPrintfScalar(str,sizeof(str),yp,PETSC_FALSE)); |
| 39 |
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10 | PetscCall(PetscPrintf(PETSC_COMM_WORLD," f'(%s)=%s\n",strx,str)); |
| 40 | |||
| 41 | /* inverse of polynomial 1/q(x) */ | ||
| 42 | 10 | nb = 3; | |
| 43 | 10 | q[0] = -3.1; q[1] = 1.1; q[2] = 1.0; | |
| 44 |
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10 | PetscCall(FNSetType(fn,FNRATIONAL)); |
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10 | PetscCall(FNRationalSetNumerator(fn,0,NULL)); /* reset previous values */ |
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10 | PetscCall(FNRationalSetDenominator(fn,nb,q)); |
| 47 |
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10 | PetscCall(FNView(fn,NULL)); |
| 48 | 10 | x = 2.2; | |
| 49 |
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10 | PetscCall(SlepcSNPrintfScalar(strx,sizeof(strx),x,PETSC_FALSE)); |
| 50 |
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10 | PetscCall(FNEvaluateFunction(fn,x,&y)); |
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10 | PetscCall(FNEvaluateDerivative(fn,x,&yp)); |
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10 | PetscCall(SlepcSNPrintfScalar(str,sizeof(str),y,PETSC_FALSE)); |
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10 | PetscCall(PetscPrintf(PETSC_COMM_WORLD," f(%s)=%s\n",strx,str)); |
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10 | PetscCall(SlepcSNPrintfScalar(str,sizeof(str),yp,PETSC_FALSE)); |
| 55 |
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10 | PetscCall(PetscPrintf(PETSC_COMM_WORLD," f'(%s)=%s\n",strx,str)); |
| 56 | |||
| 57 | /* rational p(x)/q(x) */ | ||
| 58 | 10 | na = 2; nb = 3; | |
| 59 | 10 | p[0] = 1.1; p[1] = 1.1; | |
| 60 | 10 | q[0] = 1.0; q[1] = -2.0; q[2] = 3.5; | |
| 61 |
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10 | PetscCall(FNSetType(fn,FNRATIONAL)); |
| 62 |
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10 | PetscCall(FNRationalSetNumerator(fn,na,p)); |
| 63 |
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10 | PetscCall(FNRationalSetDenominator(fn,nb,q)); |
| 64 |
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10 | PetscCall(FNSetScale(fn,1.2,0.5)); |
| 65 |
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10 | PetscCall(FNView(fn,NULL)); |
| 66 | 10 | x = 2.2; | |
| 67 |
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10 | PetscCall(SlepcSNPrintfScalar(strx,sizeof(strx),x,PETSC_FALSE)); |
| 68 |
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10 | PetscCall(FNEvaluateFunction(fn,x,&y)); |
| 69 |
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10 | PetscCall(FNEvaluateDerivative(fn,x,&yp)); |
| 70 |
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10 | PetscCall(SlepcSNPrintfScalar(str,sizeof(str),y,PETSC_FALSE)); |
| 71 |
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10 | PetscCall(PetscPrintf(PETSC_COMM_WORLD," f(%s)=%s\n",strx,str)); |
| 72 |
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10 | PetscCall(SlepcSNPrintfScalar(str,sizeof(str),yp,PETSC_FALSE)); |
| 73 |
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10 | PetscCall(PetscPrintf(PETSC_COMM_WORLD," f'(%s)=%s\n",strx,str)); |
| 74 | |||
| 75 |
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10 | PetscCall(FNRationalGetNumerator(fn,&na,&pp)); |
| 76 |
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10 | PetscCall(FNRationalGetDenominator(fn,&nb,&qq)); |
| 77 |
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10 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"Coefficients:\n Numerator: ")); |
| 78 |
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30 | for (i=0;i<na;i++) { |
| 79 |
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20 | PetscCall(SlepcSNPrintfScalar(str,sizeof(str),pp[i],PETSC_FALSE)); |
| 80 |
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20 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"%s ",str)); |
| 81 | } | ||
| 82 |
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10 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\n Denominator: ")); |
| 83 |
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40 | for (i=0;i<nb;i++) { |
| 84 |
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30 | PetscCall(SlepcSNPrintfScalar(str,sizeof(str),qq[i],PETSC_FALSE)); |
| 85 |
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30 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"%s ",str)); |
| 86 | } | ||
| 87 |
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10 | PetscCall(PetscPrintf(PETSC_COMM_WORLD,"\n")); |
| 88 |
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10 | PetscCall(PetscFree(pp)); |
| 89 |
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10 | PetscCall(PetscFree(qq)); |
| 90 | |||
| 91 | /* constant */ | ||
| 92 |
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10 | PetscCall(FNSetType(fn,FNRATIONAL)); |
| 93 |
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10 | PetscCall(FNRationalSetNumerator(fn,1,&five)); |
| 94 |
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10 | PetscCall(FNRationalSetDenominator(fn,0,NULL)); /* reset previous values */ |
| 95 |
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10 | PetscCall(FNView(fn,NULL)); |
| 96 | 10 | x = 2.2; | |
| 97 |
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10 | PetscCall(SlepcSNPrintfScalar(strx,sizeof(strx),x,PETSC_FALSE)); |
| 98 |
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10 | PetscCall(FNEvaluateFunction(fn,x,&y)); |
| 99 |
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10 | PetscCall(FNEvaluateDerivative(fn,x,&yp)); |
| 100 |
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10 | PetscCall(SlepcSNPrintfScalar(str,sizeof(str),y,PETSC_FALSE)); |
| 101 |
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10 | PetscCall(PetscPrintf(PETSC_COMM_WORLD," f(%s)=%s\n",strx,str)); |
| 102 |
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10 | PetscCall(SlepcSNPrintfScalar(str,sizeof(str),yp,PETSC_FALSE)); |
| 103 |
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10 | PetscCall(PetscPrintf(PETSC_COMM_WORLD," f'(%s)=%s\n",strx,str)); |
| 104 | |||
| 105 |
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10 | PetscCall(FNDestroy(&fn)); |
| 106 |
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10 | PetscCall(SlepcFinalize()); |
| 107 | return 0; | ||
| 108 | } | ||
| 109 | |||
| 110 | /*TEST | ||
| 111 | |||
| 112 | test: | ||
| 113 | suffix: 1 | ||
| 114 | nsize: 1 | ||
| 115 | |||
| 116 | TEST*/ | ||
| 117 |