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Optimizing Fourier transforms
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Revision as of 12:20, 30 November 2013

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to create a system-wide "wisdom" file in <code>/etc/fftw/wisdom</code>. The <code>-c</code> option specifies than canonical wisdom is created, which implies that wisdom for the fourier transforms in one-, two- or three-dimension with dimensions that are integer powers of 2 or 10 with fewer than 2^20 elements are calculated. That "wisdom" for the transform 16x16 or 100x1 will be calculated but the "wisdom" for transforms like 16x17 or 101x1 will not be. However, "wisdom" for arbitrary transforms can be created with the <code>fftw-wisdom</code> command

to create a system-wide "wisdom" file in <code>/etc/fftw/wisdom</code>. The <code>-c</code> option specifies than canonical wisdom is created, which implies that wisdom for the fourier transforms in one-, two- or three-dimension with dimensions that are integer powers of 2 or 10 with fewer than 2^20 elements are calculated. That "wisdom" for the transform 16x16 or 100x1 will be calculated but the "wisdom" for transforms like 16x17 or 101x1 will not be. However, "wisdom" for arbitrary transforms can be created with the <code>fftw-wisdom</code> command

−You are recommended to read the help file of the Octave command <code>fftw_wisdom</code> (note that this is fftw-underscore-wisdom) and FFTW's command <code>fftw-wisdom</code> (fftw-dash-wisdom) for further information

+You are recommended to read the help file of the Octave command <code>fftw_wisdom</code> (note that this is fftw-underscore-wisdom) and FFTW's command <code>fftw-wisdom</code> (fftw-dash-wisdom) for further information.

+[[Category:Installation]]

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