How to plot time-space diagram?

i have an excel file with the following type of data. Columns represent ID,time and x cordinate respectively.

Is there any way that I could plot a graph against x-cordinate and time for different IDs? I have 1000's of Id's and this is just a preview for first two ID's.

theoretically these are locations of vehicles at different times. so therefore i need to plot graphs for each vehicle in the same graph.

Thanks

Answer 1

[Birdman]

Use hold on command. Consider these vectors are stored in a multidimensional array called data.

plot(data(:,1),data(:,2));hold on;grid on;plot(data(:,1);data(:,3))

[Matlab Newbee]

Thank you for the suggestion. i tried hold on and it is useful when you have a straight forward array.

In this case, to clarify my problem, I need to filter the rows with ID '1' and plot a graph for that, and then ID '2', so on...

Is there any way that I could do that?

Thank you

[Birdman]

Yes there is. For instance, consider the following for your description in the problem.

A(A(:,1)==1,:)

The above line will give you rows with ID=1, then do the same for ID '2'. and then using plot command, you can plot whatever you want.

[Matlab Newbee]

Thank you. That is exactly what I wanted