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How can I plot an ECG txt file for analysis on Matlab?

4 vues (au cours des 30 derniers jours)
Katrina Anderson
Katrina Anderson le 10 Nov 2020
Commenté : Star Strider le 13 Nov 2020
I have an ECG file in txt format (.txt) and I was hoping to plot it using Matlab.
I have attached the file.
Thankyou for any help and advice.

Réponse acceptée

Star Strider
Star Strider le 10 Nov 2020
First, read it and assign the variables:
D = readmatrix('ECG_10.11.20_11.57.59.txt', 'HeaderLines',6);
EKG = -D(:,1); % EKG Trace (mV)
t = D(:,2)*1E-3; % Time Vector (s)
There are a lot of noise and other problems with that signal, so it is going to require a significant amount of processing. It is not regularly-sampled, so the Signal Processing Toolbox resample function will be necessary to assign it to a consistent sampling interval before further processing. (I would resample it to a sampling frequency of 130 Hz.) Note that the leads were apparently reversed, the resons for negating the EKG signal.
I leave all that to you.
  2 commentaires
Katrina Anderson
Katrina Anderson le 13 Nov 2020
awesome thankyou!!
Very helpful indeed :)
Star Strider
Star Strider le 13 Nov 2020
As always, my pleasure!
I very much appreciate your compliment!

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Plus de réponses (1)

Mathieu NOE
Mathieu NOE le 10 Nov 2020
if you work with a recent release of matlab, there are plenty of solutions... but not all are fast. usually the "modern" function can do very nice on complex formatted files, but the price is it's slow
you can try :
but if you just need something simple , fast for simple files , I really enjoy the readclm function - see attached files
it will gives you the header txt and the data , and it's fast !
>> head
head =
DATE/TIME: 10.11.20 11.57.59
all the best
  1 commentaire
Katrina Anderson
Katrina Anderson le 13 Nov 2020
thankyou! i will look into this also as I have just downloaded the new version :) appreciate your help

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