boinsterman

Does anyone have a good explanation for how a Fourier transform works? or a good, free resource that explains it well? (I reviewed my precalculus on complex numbers, but get lost when it gets to the transform formula and chart. Most importantly, what does it actually do?

For those who are unaware of it, a Fourier transform is the mathematical means by which wave functions are described, or some wave functions for some types of radiation. It seems to require an understanding of a formula with the name Euler, which states

e^ix = cos(x) + isin(x)

and is much better explained on Wikipedia at http://en.wikipedia.org/wiki/Fourier_transform.

I tried to post this yesterday with the actual name of the formula, but that contains a single apostrophe, and that supposedly is what caused the text to not display (and for the post to be deleted?).

For those who are unaware of it, a Fourier transform is the mathematical means by which wave functions are described, or some wave functions for some types of radiation. It seems to require an understanding of a formula with the name Euler, which states

e^ix = cos(x) + isin(x)

and is much better explained on Wikipedia at http://en.wikipedia.org/wiki/Fourier_transform.

I tried to post this yesterday with the actual name of the formula, but that contains a single apostrophe, and that supposedly is what caused the text to not display (and for the post to be deleted?).