title: Fourier analysis of biological signals with a programmable calculator.
abstract: A Fourier analysis program written for the Texas Instruments TI-59 programmable calculator is presented. The program determines the Fourier coefficients of any time varying periodic signal.
mesh_terms: D003201:Computers; D005583:Fourier Analysis; D006801:Humans; D008433:Mathematics; D010992:Plethysmography, Impedance / Q000379:methods; D012984:Software; D014636:Valsalva Maneuver