Dear Manana,
Please note that you can’t load OptiSystem or Matlab files to the forum.
You need to make sure that the number of samples in the Matlab code and OptiSystem project match. You could make use up-sampling or down-sampling to achieve that. Also, you need to set the domain that is used for the calculation in the Matlab component correctly in field “Sampled signal domain” in the Main tab of the Matlab component properties window.
I hope these recommendations help.
Regards,
Ahmad