Cannot read data from a table to create a graph

Hey everyone!

I have a table with data from motor sensors, but I cannot create graphs based on the data. And I don't understand what is wrong) Could someone help me?

This is the code:

Table that I use:

Error:

[Walter Roberson]

Which MATLAB version are you using?

[Artur Nuritdinov]

R2019a

[madhan ravi]

upload your data and code

[Artur Nuritdinov]

Code and table

Answer 1

[Guillaume]

The problem is that your timestamp column is text and matlab does not know how to use text as a plot variable.

I assume that the text is supposed to be a duration, if so:

sensorData.timestamp = duration(sensorData.timestamp, 'InputFormat', 'mm:ss.S')  %Don't know if it's the correct format
for i = 1:4
    subplot(2,2,i)
    plot(sensorData.timestamp,sensorData{:,9+i})
    xlabel('Time')
end

[Artur Nuritdinov]

Hm, it worked with 200 rows of data, but it doesn't work with 5000 rows of data. I tried hh:mm:ss.S and mm:ss.S. The problem is already in the first row of the table

Attached the bigger table (Motor1_1) and the smaller one (Motor11) to the message

[Guillaume]

The two files have completely different time format. Motor1_1.csv should be read as datetime directly by readtable in any recent version of matlab, so wouldn't need any conversion.

Motor11.csv having an unconventional time encoding needs the conversion as I've shown.

Answer 2

[Artur Nuritdinov]

I have found the mistake. Below is the correct code

[Guillaume]

Please don't post screenshots of the code. Paste the code as text.

It's a bit poor form to accept your own answer, particularly as you didn't identify the original problem. Reputation, which we only get when answers are accepted or voted on is the only reward we get for helping you.

[Artur Nuritdinov]

Guillaume, sorry, I didn't know it. This is the first time when I ask the question and, in general, use MATLAB Answers. Thanks for your help! Will keep it in mind next time