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--- heartbeats [2010/06/22 21:18] – added instruction on how to load a MAT file to this page also jochen
+++ heartbeats [2010/06/29 17:17] (current) – updated help jochen
@@ Line 26: / Line 26: @@
 <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:
@@ Line 34: / Line 34: @@
          .badt      t-threshold for detecing irregularity (default: 25)
          .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)
          .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)
          .pfreps    pre-filter repetitions (default: 2)
-         .freq      data frequency in Hz (default: 1000)
          .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)
+         .resfreq   resample data prior to detection (default: [])
          .segsize   segmentation size in seconds (default: 5)
          .segstep   stepping (window shift) in seconds (default: 1)
          .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:
@@ Line 56: / Line 74: @@
         wgd         guess whether window is good or not
         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 =====