Mercurial > repos > public > sbplib
annotate isEquidistant.m @ 1031:2ef20d00b386 feature/advectionRV
For easier comparison, return both the first order and residual viscosity when evaluating the residual. Add the first order and residual viscosity to the state of the RungekuttaRV time steppers
author | Vidar Stiernström <vidar.stiernstrom@it.uu.se> |
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date | Thu, 17 Jan 2019 10:25:06 +0100 |
parents | b43c4d841afe |
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rev | line source |
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Add isEquidistant function for testing vectors
Jonatan Werpers <jonatan@werpers.com>
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1 % Tests if consecutive elements of vector v are euidistant |
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Add isEquidistant function for testing vectors
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2 function b = isEquidistant(v) |
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3 if length(v) < 2 |
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4 error('sbplib:isEquidistant:inputTooShort', 'Input vector is too short'); |
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5 end |
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Jonatan Werpers <jonatan@werpers.com>
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6 |
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7 tol = 1e-8; |
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8 |
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9 d = v(2:end) - v(1:end-1); |
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10 err = abs(d - d(1)); |
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11 |
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12 relErr = err./abs(d); |
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13 |
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14 I_zero = find(d < tol); |
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15 |
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16 relErr(I_zero) = err(I_zero); |
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17 |
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18 b = all(relErr < tol); |
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19 end |