loading ECG signal and displaying it in time doman

100 次查看（过去 30 天）
Jeslin Joseph
Jeslin Joseph 2021-12-7
评论： Rena Berman 2022-8-23
An ECG signal has been measured and provided to you as a .mat file. a) Load this file to MATLAB and sketch it in time domain. b) Find the sampling time (𝑇𝑠) and then sampling frequency (𝐹𝑠) used for this signal. c) Sketch the magnitude spectrum of this signal. d) Observe the time and frequency domain plots you sketched and use filtering techniques to reduce the bias and noise of the measured signal. You are allowed to use several filters, but do not have to. e) Add figures and specifications of the filter(s) you designed and used. f) Sketch the filtered signal in time and frequency domains.
matname = 'noisyECGMiniProject3.mat';
D = load(matname);
EKG= D.EKG;
t = D.t';
Fs = D.Fs;
Ts = mean(diff(t));
Fsc = 1/Ts;
figure(1)
plot(t, EKG)
grid
Reference to non-existent field 'EKG'.
Error in part1mini (line 3)
EKG= D.EKG;
how do fix this
  2 个评论
Rik
Rik 2021-12-17
loading ECG signal and displaying it in time doman
An ECG signal has been measured and provided to you as a .mat file. a) Load this file to MATLAB and sketch it in time domain. b) Find the sampling time (𝑇𝑠) and then sampling frequency (𝐹𝑠) used for this signal. c) Sketch the magnitude spectrum of this signal. d) Observe the time and frequency domain plots you sketched and use filtering techniques to reduce the bias and noise of the measured signal. You are allowed to use several filters, but do not have to. e) Add figures and specifications of the filter(s) you designed and used. f) Sketch the filtered signal in time and frequency domains.
matname = 'noisyECGMiniProject3.mat';
D = load(matname);
EKG= D.EKG;
t = D.t';
Fs = D.Fs;
Ts = mean(diff(t));
Fsc = 1/Ts;
figure(1)
plot(t, EKG)
grid
Reference to non-existent field 'EKG'.
Error in part1mini (line 3)
EKG= D.EKG;
how do fix this

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Cris LaPierre
Cris LaPierre 2021-12-7
It would appear your mat file does not contain a variable named EKG. The fix is to use the actual name of the variable, or be sure to include a variable with that name in the mat file. Run the following code to see what variables are in your mat file.
D = load('noisyECGMiniProject3.mat');
who(D)
Reference: https://www.mathworks.com/help/matlab/ref/matlab.io.matfile.html#mw_f3211b12-f06c-4694-a8c4-70e16a8fff5f

类别

在 Help Center 和 File Exchange 中查找有关 Descriptive Statistics 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by