I understand you are trying to extract the data from Simulink signal, the following workaround may help you to perform the desired function:
- Configuring the signal to be exported to workspace by right clicking on the signal and selecting “log selected signals”. More customization on how the signal has to be logged can be done in "Data Import/Export" section of Configuration parameters. For more information refer to the following documentation:
- By using "To Workspace" block the signal can be logged into Workspace and subsequently to a MAT file. To learn more about this block refer to the following documentation:
Once, the signal is logged the required frequency operation can be done by using a programmatic approach. The following MATLAB answer could be referred for extracting the requried frequency:
