Separate data to plot as multiple lines

Question

Desmond 2024-8-22

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https://ww2.mathworks.cn/matlabcentral/answers/2147364-separate-data-to-plot-as-multiple-lines

评论： Star Strider 2024-8-22

It has been a while since I have touched matlab, and as such I can't quite figure out how to solve this issue. Essentially, I have data being created to monitor a device. This data is in an excel sheet, and I have imported that excel sheet into matlab. The table is then parsed to only include certain data for creation of each plot. My problem is when plotting the table, which has multiple runs included. An example of such I will be including below:

run time var1

0 0 0

0 1 1

0 2 ...

1 3 ...

1 4 ...

2 5 ...

3 6 50

My question is how would I split this data so that I can plot each run as a seperate line on the same graph? So in this case, it would be a line plot showing the 4 runs (0-3) as separate lines, comparing time to the change in the variables. Thank you.

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Answer 1

Star Strider 2024-8-22

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https://ww2.mathworks.cn/matlabcentral/answers/2147364-separate-data-to-plot-as-multiple-lines#answer_1503719

I don’t completely understand what you want to do, however I refer you to findgroups and splitapply to start with. There are other approaches, however those might be the easiest to work with. Their documentation pages might also suggest other functions that could be more appropriate.