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smoothA3D performs a Gaussian smooth on a 3D inverted A-matrix. Syntax:


iA is the inverted A-matrix. The parameters of the smoothing function are given by gbox<tt> (the size of the filter in pixels) and <tt>gsigma (the width of the Gaussian kernel). dim is a struct containing information about the A-matrix so that smoothA2d can reshape it correctly.

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