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annotate fourInv.m @ 1258:74eec7e69b63 feature/FMMlabb

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Speed up computations using RungeKuttaSecondOrder when only the source term is time dependent.
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Fri, 13 Mar 2020 12:07:00 +0100
parents f6ada1719420
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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598
f6ada1719420 Add functions for calculating fourier transforms
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
1 function u = ifour(u_hat)
f6ada1719420 Add functions for calculating fourier transforms
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
2 u_hat = ifftshift(u_hat);
f6ada1719420 Add functions for calculating fourier transforms
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
3 u = ifft(u_hat);
f6ada1719420 Add functions for calculating fourier transforms
Jonatan Werpers <jonatan@werpers.com>
parents:
diff changeset
4 end