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heartbeats [2010/06/22 23:18]
jochen added instruction on how to load a MAT file to this page also
heartbeats [2010/06/29 19:17] (current)
jochen updated help
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 <​file> ​ heartbeats ​ - detect heart beats and frequency in physio data <​file> ​ heartbeats ​ - detect heart beats and frequency in physio data
    
-  FORMAT: ​      [bp, bs, bf, bv, cp, wgd, wd] = heartbeats(sig [, opts])+  FORMAT: ​      [bp, bs, bf, bv, cp, wgd, wd, hrv] = heartbeats(sig [, opts])
    
   Input fields:   Input fields:
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          ​.badt ​     t-threshold for detecing irregularity (default: 25)          ​.badt ​     t-threshold for detecing irregularity (default: 25)
          ​.bppre ​    ​pre-defined positions (no detection, only inspection)          ​.bppre ​    ​pre-defined positions (no detection, only inspection)
 +         ​.calc ​     preprocessing calculcation,​ one of
 +                    {'​none'​} - don't to anything (default)
 +                    {'​absdiff'​} - use abs(diff(data))
 +                        if .detlength is not given, will be set to 0.02
 +                        if .skewdt is not given, will be set to 0.1
 +                    {'​diffsq'​} - square the diff of the data
 +                        if .detlength is not given, will be set to 0.01
 +                        if .skewdt is not given, will be set to 0.05
 +                    {'​fourthz'​} - fourth power of the z-transformed data
 +                        if .detlength is not given, will be set to 0.02
 +                        if .skewdt is not given, will be set to 0.04
 +                    {'​squarez'​} - square the z-transformed data
 +                        if .detlength is not given, will be set to 0.03
 +                        if .skewdt is not given, will be set to 0.1
 +                    {'​thirdz'​} - third power of the abs z-transformed data
 +                        if .detlength is not given, will be set to 0.02
 +                        if .skewdt is not given, will be set to 0.06
          ​.cleanup ​  ​interactive cleanup (default: false)          ​.cleanup ​  ​interactive cleanup (default: false)
          ​.detlength detection length threshold in seconds (default: 0.05)          ​.detlength detection length threshold in seconds (default: 0.05)
 +         ​.freq ​     data frequency in Hz (default: 1000)
          ​.pflength ​ pre-filter length in seconds (default: 0.025)          ​.pflength ​ pre-filter length in seconds (default: 0.025)
          ​.pfreps ​   pre-filter repetitions (default: 2)          ​.pfreps ​   pre-filter repetitions (default: 2)
-         ​.freq ​     data frequency in Hz (default: 1000) 
          ​.plot ​     plot mean +/- std estimate of signal (default: false)          ​.plot ​     plot mean +/- std estimate of signal (default: false)
-         ​.plotfreq ​ samples per second to plot+         ​.plotfreq ​ samples per second to plot (default: 50)
          ​.plotwin ​  plot window size in seconds (default: 6)          ​.plotwin ​  plot window size in seconds (default: 6)
 +         ​.resfreq ​  ​resample data prior to detection (default: [])
          ​.segsize ​  ​segmentation size in seconds (default: 5)          ​.segsize ​  ​segmentation size in seconds (default: 5)
          ​.segstep ​  ​stepping (window shift) in seconds (default: 1)          ​.segstep ​  ​stepping (window shift) in seconds (default: 1)
          ​.skewdt ​   skewness detection threshold multiplier (default: 0.5)          ​.skewdt ​   skewness detection threshold multiplier (default: 0.5)
-         .windsor ​  ​windsorizing ​threshold in std's (default: 3)+         .winsor ​   winsorizing ​threshold in std's (default: 3)
    
   Output fields:   Output fields:
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         wgd         guess whether window is good or not         wgd         guess whether window is good or not
         wd          windowed data (in 100Hz resolution, interpolated)         wd          windowed data (in 100Hz resolution, interpolated)
 +        hrv         ​output of computehrv(bp)
    
-  Note: this function is still preliminary</​file>​+  Note: this function is still preliminary, other options passed on to 
 +        computehrv (if 8th output is requested), with .hrvrfreq being 
 +        set to .resfreq</​file>​
  
 ===== Usage overview ===== ===== Usage overview =====
heartbeats.1277241536.txt.gz · Last modified: 2010/06/22 23:18 by jochen