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annotate isEquidistant.m @ 774:66eb4a2bbb72 feature/grids

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Remove default scaling of the system. The scaling doens't seem to help actual solutions. One example that fails in the flexural code. With large timesteps the solutions seems to blow up. One particular example is profilePresentation on the tdb_presentation_figures branch with k = 0.0005
author Jonatan Werpers <jonatan@werpers.com>
date Wed, 18 Jul 2018 15:42:52 -0700
parents b43c4d841afe
children
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b43c4d841afe Add isEquidistant function for testing vectors
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1 % Tests if consecutive elements of vector v are euidistant
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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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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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12 relErr = err./abs(d);
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14 I_zero = find(d < tol);
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16 relErr(I_zero) = err(I_zero);
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18 b = all(relErr < tol);
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19 end