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annotate isEquidistant.m @ 1037:2d7ba44340d0 feature/burgers1d

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Pass scheme specific parameters as cell array. This will enabale constructDiffOps to be more general. In addition, allow for schemes returning function handles as diffOps, which is currently how non-linear schemes such as Burgers1d are implemented.
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Fri, 18 Jan 2019 09:02:02 +0100
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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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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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