pd5si                package:fractal                R Documentation

_G_a_i_t _s_t_r_i_d_e _i_n_t_e_r_v_a_l_s _f_o_r _a _p_a_t_i_e_n_t _w_i_t_h _P_a_r_k_i_n_s_o_n'_s _D_i_s_e_a_s_e

_D_e_s_c_r_i_p_t_i_o_n:

     These data are from the file 'pd5-si.txt' in the `gait in aging
     and disease' database of PhysioBank, which is a large collection
     of physiologic signals maintained as a public service at
     'http://www.physionet.org/physiobank' by NIH's National Center for
     Research Resources. The following quote from this Web site
     describes how the stride intervals were obtained. _Subjects walked
     continuously on level ground around an obstacle-free path. The
     stride interval was measured using ultra-thin, force sensitive
     resistors placed inside the shoe. The analog force signal was
     sampled at 300 Hz with a 12 bit A/D converter, using an
     ambulatory, ankle-worn microcomputer that also recorded the data.
     Subsequently, the time between foot-strikes was automatically
     computed. The method for determining the stride interval is a
     modification of a previously validated method that has been shown
     to agree with force-platform measures, a `gold' standard._

     _Data were collected from the healthy subjects as they walked in a
     roughly circular path for 15 minutes, and from the subjects with
     Parkinson's disease as they walked for 6 minutes up and down a
     long hallway._

_S_e_e _A_l_s_o:

     'beamchaos', 'ecgrr', 'eegduke', 'lorenz'.

_E_x_a_m_p_l_e_s:

     plot(pd5si)

