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why i get 2 signals in the same plot?

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Good mind
Good mind 2017-11-27
关闭： Good mind 2018-5-27
this is the code to plot a signal loaded from physionet(MIT-BIH Arrhythmia database) but i get 2 signals in the same plot.what is the problem?
load ('100m.mat');
Ecg=(val-1042)/200;
fs=360;
ts=(0:length(Ecg)-1)/fs;
plot(ts,Ecg);

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Sammit Jain
Sammit Jain 2017-11-27
I think you may want to look at the file 100m.mat closely. It's likely that your variable Ecg (coming from val) has two entries instead of just one. How does one entry in 100m.mat look?
If the column 'val' has 2 columns, then use
Ecg = val(:,1)
(or 2 depending on what column is relevant)
Cheers.
  1 个评论
Good mind
Good mind 2017-11-29
编辑：Good mind 2017-11-29
thank you.
Source: record mitdb/100 val has 2 rows (signals) and 3600 columns (samples/signal)Duration:0:10 this is from 100m.info i want to plot the signal versus the time. how can i?

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