Which program is best for discrete Fourier transforms on asteroid light curves?

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For analyzing asteroid light curves using discrete Fourier transform (DFT), Matlab is highly recommended due to its user-friendly interface and robust capabilities. Several users suggest looking into other software options that support DFT, but emphasize the importance of ensuring compatibility with data formats. Many existing programs lack clear documentation on data input, which can lead to confusion. It's advised to seek out utilities that explicitly state supported data formats to facilitate a smoother analysis process.
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I'm looking for a pretty simple to use discrete Fourier transform utility to use with my asteroid light curves. Does anyone know of a really good program to use. I have found a couple on the internet but they don't specify what format to insert the data so I would appreciate any suggestions or recommendations.
 
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