How to update .mat file in simulink.

Hello,

I have a Matlab function block which loads a variable from a .mat file and work on it. I then updates the variable and then returns the value to a 'To File' block in simulink which saves the variable by the same name.

But every time I run the simulation, it creates a new .mat file by the same name with null value. Is there a solution for that?

I want to access the variable, change its value and then save it again by the same name.

Thanks for the help.

[Fangjun Jiang]

What is the reason running it in Simulink? Keep in mind that the MATLAB Function block is executed every simulation step, e.g. 0.01 seconds.

Answer 1

[Rohit Pappu]

To File block creates a duplicate file every time the simulation happens.

A possible workaround would be to use Input and Output blocks instead.

• Assign the same variable names to both input and output.
• Load and Save the MAT-file containing the variables using callback functions.