How can I use a variable used in .m file into the simulink model?
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You can use a block called "from workspace" in simulink source library.
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Why I'm not able use one column data, for 'From workspace' block it says I need two dimensions and at least two columns.
i'm not sure if you still have this problem, but when you use a 'From workspace' block you need a signal vector and a time vector. Otherwise the simulation would not know to which time a certain signal value belongs.
If you just have a constant signal over time, you can just put the name of your variable in workspace as value of the constant in the block. It's works also for gains and parameters of masked subsystems (like amplitude of sinus source block)
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