annotate isEquidistant.m @ 577:e45c9b56d50d feature/grids

Add an Empty grid class The need turned up for the flexural code when we may or may not have a grid for the open water and want to plot that solution. In case there is no open water we need an empty grid to plot the empty gridfunction against to avoid errors.
author Jonatan Werpers <jonatan@werpers.com>
date Thu, 07 Sep 2017 09:16:12 +0200
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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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