Combining many variables into one table

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erin wootton
erin wootton on 10 Mar 2022
Commented: Benjamin Thompson on 11 Mar 2022
I have 100 variables from simulink output all stored in a huge .mat file (after being collated from seperated .mat files). I just want a specific variable from each one in a table. The examples of making a table have a few variables in that you type the names manually to create the table.
T = table (results(1, 1).Collision1.signals.values, results(2, 1).Collision1.signals.values,results(3, 1).Collision1.signals.values, results(4, 1).Collision1.signals.values
I will have 300 so this isnt an option.
How can I get the specific variable out I want :
results(1, 1).Collision1.signals.values
results(2, 1).Collision1.signals.values
results(3, 1).Collision1.signals.values
******
results(99, 1).Collision1.signals.values
results(100, 1).Collision1.signals.values
and plot them all in one table?
(figure 1, variables from .mat resullts workspace)
Many thanks
Erin

Answers (2)

Benjamin Thompson
Benjamin Thompson on 10 Mar 2022
You can use addvars in a for loop to successively add columns to a table. Note all table columns will need to have the same number of entries. I am guessing at variable names here but if you have further questions post sample data.
T = table();
for i = 1:N
T = addvars(T, results(i, 1).Collision1.signals.values,['results(' num2str(i) ', 1).Collision1.signals.values']);
end
  4 Comments
Benjamin Thompson
Benjamin Thompson on 11 Mar 2022
Yes the OP is free to use some alternative variable naming scheme.

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Peter Perkins
Peter Perkins on 11 Mar 2022
In recent MATLAB version, there's Simulink.Simulation.Dataset called extractTimetable. Not sure if that's what you have, but it might help.

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