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[37] | 1 | function p = imag(q) |
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| 2 | % IMAG Imaginary part of a quaternion. |
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| 3 | % (Quaternion overloading of standard Matlab function.) |
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| 4 | % |
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| 5 | % This function returns the quaternion that is the imaginary |
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| 6 | % part of q. If q is a real quaternion, it returns zero. |
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| 7 | |
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| 8 | % Copyright © 2005 Stephen J. Sangwine and Nicolas Le Bihan. |
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| 9 | % See the file : Copyright.m for further details. |
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| 10 | |
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| 11 | error(nargchk(1, 1, nargin)), error(nargoutchk(0, 1, nargout)) |
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| 12 | |
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| 13 | if ispure(q) |
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| 14 | p = quaternion(imag(x(q)), imag(y(q)), imag(z(q))); |
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| 15 | else |
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| 16 | p = quaternion(imag(s(q)), imag(v(q))); |
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| 17 | end |
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| 18 | |
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