Nerd Rage

Since I have so much to do with the dis­crete Fourier trans­form (DFT) – both recently and not so recently – I always wanted to make a sort of “cheat sheet” about it with the most impor­tant rela­tions of the var­i­ous time and fre­quency dimen­sions and some of the more impor­tant trans­form pairs all on one page. Finally got around to do this (and I had to sac­ri­fice quite a bit of Dragon Age time for this). I wish I had had this four or five years ago – I can­not fathom how much time this would have saved me that I spent on think­ing about var­i­ous aspects of the DFT…

I’m hop­ing this might be use­ful for other folks out there as well (espe­cially the MATLAB wiz­ards), so I’m mak­ing it avail­able for down­load. If you think there’s some­thing wrong or miss­ing, let me know in the com­ments and I’ll try to fix it.

Down­load the DFT Cheat Sheet.

If I find the time and moti­va­tion, I’m plan­ning on doing some­thing sim­i­lar for the reg­u­lar Fourier trans­form (prob­a­bly with­out the images) and for some of the more impor­tant trigono­met­ric iden­ti­ties, since I find myself look­ing this stuff up in Wikipedia all. the. time.