How to update .mat file in simulink.

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Nishant Kumar
Nishant Kumar 2020-3-30
回答： Rohit Pappu 2020-9-4
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.
  1 个评论
Fangjun Jiang
Fangjun Jiang 2020-3-30
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.

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回答（1 个）

Rohit Pappu
Rohit Pappu 2020-9-4
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.

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