How to plot Marker data in MatLab

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Yasir Khan 2016-7-24

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https://ww2.mathworks.cn/matlabcentral/answers/296952-how-to-plot-marker-data-in-matlab

评论： Walter Roberson 2016-7-24

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Hi. I want to know how I can plot the marker data from an EDF file in MatLab.

So I use edfread to convert the EDF file :

[header, data] = edfread('Subject1.edf');

and then I get the below after typing in header

      ver: 0
    patientID: '1                                                                               '
     recordID: '1                                                                               '
    startdate: '11.07.16'
    starttime: '07.52.30'
        bytes: 9472
      records: 948
     duration: 1
           ns: 36
        label: {1x36 cell}
   transducer: {1x36 cell}
        units: {1x36 cell}
  physicalMin: [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
  physicalMax: [1x36 double]
   digitalMin: [0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0]
   digitalMax: [1x36 double]
    prefilter: {1x36 cell}
      samples: [1x36 double]

the marker is in label, so I access it by typing in

header.label

which gives me the below

>> hdr.label
ans = 
    Columns 1 through 13
      'COUNTER'    'INTERPOLATED'    'AF3'    'F7'    'F3'    'FC5'    'T7'    'P7'    'O1'    'O2'    'P8'    'T8'    'FC6'
    Columns 14 through 24
      'F4'    'F8'    'AF4'    'RAW_CQ'    'CQ_AF3'    'CQ_F7'    'CQ_F3'    'CQ_FC5'    'CQ_T7'    'CQ_P7'    'CQ_O1'
    Columns 25 through 34
      'CQ_O2'    'CQ_P8'    'CQ_T8'    'CQ_FC6'    'CQ_F4'    'CQ_F8'    'CQ_AF4'    'CQ_CMS'    'CQ_DRL'    'GYROX'
    Columns 35 through 36
      'GYROY'    'MARKER'