Plotting EMG Data From a .txt file.

I need to plot the EMG signal from the data attached. I am unsure as how to even tackle this data set. Any guidance would be appreciated.

[Star Strider]

‘I am unsure as how to even tackle this data set.’

So am I.

I plotted it several different ways (including as a mesh plot), and could not make any sense of it at all. If you get any more information about that file, please share it.

[Logan Thurston]

The assignment calls for us to calculate the variance of the first 5, and last 5 trials. As well as plot the overall data. So my current train of thought is that each row of data is a trial.

In previous lessons, we wrote a code and it saved the data in the same way. I attatched it, but it is very messy with notes and such. (I also attached a clean version).

I am just unsure how to go backwards from where we left off in the code I posted. But I think that's the key.

[Star Strider]

That makes sense. It looks like an ensemble to me (although without a time vector), so thinking about it later, it occurred to me that taking the ensemble average would be appropriate.

If it represents EMG records over time, and you need to estimate the means or medians first 5 and the last 5 (assuming they are ordered that way), I would calculate the ensemble averages or ensemble medians of those groups and the standard deviations at each point, and from that calculate the 95% confidence intervals. You could also do paired statistics on those, such as the paired t-test, the Wilcoxon rank-sum test, or whatever is appropriate.

[Logan Thurston]

Sorry for late response, other projects needed some love. I have made some good strides, but I was hoping for another bit of help.

For some reason my Varaince ratio for trials 1-5 is astronomically high compared to my VR for trials 21-25.

I cant see why they would differ so much.

Thanks for any input