gibson:teaching:spring-2014:iam950:hw1
====== Differences ====== This shows you the differences between two versions of the page.
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gibson:teaching:spring-2014:iam950:hw1 [2014/02/27 09:36] gibson |
gibson:teaching:spring-2014:iam950:hw1 [2014/02/27 09:39] (current) gibson |
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| subtlety. | subtlety. | ||
| - | Based on the above, here's a short example of how to differentiate in Fourier space on | + | Based on the above, here's a short example of how to do Fourier differentiation in Matlab on |
| a [0,L] periodic domain. This should be plenty to get you started for the time-stepping codes. | a [0,L] periodic domain. This should be plenty to get you started for the time-stepping codes. | ||
| Line 134: | Line 134: | ||
| alpha = 2*pi*k/L; | alpha = 2*pi*k/L; | ||
| D = i*alpha; | D = i*alpha; | ||
| - | dudxt_fft = real(ifft(D.*fft(u)); | + | dudx_fft = real(ifft(D.*fft(u))); |
| % Plot everybody | % Plot everybody | ||
| Line 141: | Line 141: | ||
| xlabel('x') | xlabel('x') | ||
| </code> | </code> | ||
| - | |||
gibson/teaching/spring-2014/iam950/hw1.1393522604.txt.gz · Last modified: 2014/02/27 09:36 by gibson
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