why i get 2 signals in the same plot?

Question

Good mind 2017-11-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/369559-why-i-get-2-signals-in-the-same-plot

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);

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

此问题已关闭。

Answer 1

Sammit Jain 2017-11-27

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/369559-why-i-get-2-signals-in-the-same-plot#answer_293416

在 MATLAB Online 中打开

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
显示 -1更早的评论隐藏 -1更早的评论

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?