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annotate fourInv.m @ 842:619561e9ec0e feature/burgers1d

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Reformulate the RK4 time stages in order to easier see how the residual should be updated.
author Vidar Stiernström <vidar.stiernstrom@it.uu.se>
date Fri, 14 Sep 2018 16:40:19 +0200
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