programming:transform_spectral_coeff_to_physical_data_points
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programming:transform_spectral_coeff_to_physical_data_points [2010/08/28 16:04] emmanuel |
programming:transform_spectral_coeff_to_physical_data_points [2010/08/28 16:08] (current) emmanuel |
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| We can determine the physical values from the spectral coefficients by evaluating the expansion sum (eqn 20 in the user's manual.) | We can determine the physical values from the spectral coefficients by evaluating the expansion sum (eqn 20 in the user's manual.) | ||
| - | I wanted to compared the physical values computed by this sum with the values returned by the method u.makephysical(). This method use FFTW. | + | I wanted to compared the physical values computed by this sum with the values returned by the method u.makephysical(). This method use the FFTW algorithm and |
| - | So I was just wondering if there is any difference. The fact is that, I do not obtained the same results. | + | I was expecting no difference. The fact is that, I do not obtained the same results. |
| I have attached part of the code I am using. Do you think that something is incorrect ? | I have attached part of the code I am using. Do you think that something is incorrect ? | ||
| Line 19: | Line 19: | ||
| Example of results displayed : | Example of results displayed : | ||
| - | 0.00258953 // u computing Fourier series | + | 0.00258953 // u from expansion sum |
| 0.00604268 // return of u.makePhysical (FFTW) | 0.00604268 // return of u.makePhysical (FFTW) | ||
programming/transform_spectral_coeff_to_physical_data_points.1283036695.txt.gz · Last modified: 2010/08/28 16:04 by emmanuel
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