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1 | function Y = fftshift(X,dim) |
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2 | % FFTSHIFT Shift zero-frequency component to center of spectrum. |
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3 | % (Quaternion overloading of standard Matlab function.) |
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4 | |
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5 | % Copyright © 2005 Stephen J. Sangwine and Nicolas Le Bihan. |
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6 | % See the file : Copyright.m for further details. |
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7 | |
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8 | error(nargchk(1, 2, nargin)), error(nargoutchk(0, 1, nargout)) |
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9 | |
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10 | if nargin == 1 |
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11 | if ispure(X) |
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12 | Y = quaternion( fftshift(x(X)), fftshift(y(X)), fftshift(z(X))); |
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13 | else |
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14 | Y = quaternion(fftshift(s(X)), fftshift(x(X)), fftshift(y(X)), fftshift(z(X))); |
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15 | end |
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16 | else |
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17 | if ispure(X) |
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18 | Y = quaternion( fftshift(x(X), dim), fftshift(y(X), dim), fftshift(z(X), dim)); |
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19 | else |
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20 | Y = quaternion(fftshift(s(X), dim), fftshift(x(X), dim), fftshift(y(X), dim), fftshift(z(X), dim)); |
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21 | end |
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22 | end |
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