complex math is beautiful and it does relate to trig nicely (sum of exponentials) but i'm not sure if complex is useful in stats. in all my stats courses i di

complex math is beautiful and it does relate to trig nicely (sum of exponentials) but i'm not sure if complex is useful in stats. in all my stats courses i didn't see any complex, maybe simply because all observations are of real number (height, age, stock price, etc) oh wait, maybe in the stochastic (cyclostationary process, etc) ... my memory betrays me. oh well, dsp is fun ;)