root / synthbench / euroben-dm / mod2as / .svn / text-base / check.f.svn-base @ 0:839f52ef7657
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Subroutine check( ncols, nrows, nelmts, indx, rowp, outvec, ok ) |
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! --------------------------------------------------------------------- |
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! --- Routine 'check' checks the solution vector 'x' in 'b = Ax'. The |
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! check is possible because of the special definition of 'A' & 'b'. |
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! --------------------------------------------------------------------- |
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Use numerics |
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Use dist_module |
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Implicit None |
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|
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Integer :: ncols, nrows, nelmts |
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Integer :: indx(nelmts), rowp(nrows) |
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Real(l_) :: outvec(nrows) |
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Logical :: ok |
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|
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Integer :: i |
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Real(l_) :: eps, rowsum |
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! --------------------------------------------------------------------- |
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eps = 2.0_l_*ncols*Epsilon( 1.0_l_ ) |
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Do i = 1, nrows - 1 |
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rowsum = Real( rowp(i+1) - rowp(i), l_ ) |
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ok = ok .AND. ( Abs( outvec(i) - rowsum ) <= eps ) |
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End Do |
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rowsum = Real( nelmts - rowp(nrows) + 1, l_ ) |
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ok = ok .AND. ( Abs( outvec(nrows) - rowsum ) <= eps ) |
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! --------------------------------------------------------------------- |
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End Subroutine check |