r8utt
r8utt,
an Octave code which
carries out some basic linear algebra operations on R8UTT matrices
(real 64 bit precision upper triangular Toeplitz format).
Licensing:
The computer code and data files described and made available on this web page
are distributed under
the GNU LGPL license.
Languages:
r8utt is available in
a C version and
a C++ version and
a Fortran90 version and
a MATLAB version and
an Octave version and
a Python version.
Related Data and Programs:
r8utt_test
Reference:
-
Igor Podlubny,
Matrix approach to discrete fractional calculus,
Fractional Calculus and Applied Analysis,
Volume 3, Number 4, pages 359-386, 2000.
Source Code:
-
i4_log_10.m,
returns the integer part of the logarithm base 10 of abs(X);
-
r8_uniform_01.m,
is a uniform random number generator;
-
r8ge_print.m,
prints an R8GE matrix;
-
r8ge_print_some.m,
prints some of an R8GE matrix;
-
r8utt_det.m,
computes the determinant of an R8UTT matrix;
-
r8utt_indicator.m,
returns an R8UTT indicator matrix;
-
r8utt_inverse.m,
returns the inverse of an R8UTT matrix;
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r8utt_mm.m,
computes the product A*B of two R8UTT matrices.
-
r8utt_mtm.m,
computes the product A*B of two R8UTT matrices.
-
r8utt_mtv.m,
multiplies a vector times an R8UTT matrix;
-
r8utt_mv.m,
multiplies an R8UTT matrix times a vector;
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r8utt_print.m,
prints an R8UT matrix;
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r8utt_print_some.m,
prints some of an R8UTT matrix;
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r8utt_random.m,
randomizes an R8UTT matrix;
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r8utt_sl.m,
solves an R8UTT linear system A*x=b;
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r8utt_slt.m,
solves an R8UTT linear system A'*x=b;
-
r8utt_to_r8ge.m,
converts an R8UTT matrix to an R8GE matrix;
-
r8utt_zeros.m,
zeros out space for an R8UTT matrix.
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r8vec_indicator1.m,
sets an R8VEC to the indicator1 vector;
-
r8vec_print.m,
prints an R8VEC;
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r8vec_uniform_01.m,
returns an R8VEC of pseudorandom values.
Last revised on 22 May 2023.