Hi,
if you want to use variables as input/parameters not constants, you can define the parameter in MATLAB workspace and use that variable instead of the constant values as parameter.
The steps are:
-Define the variable for parameter in MATLAB workspace
-Define a constant block and double clicking the block to open parameter dialogue box
- Use the variable name defined in the MATLAB workspace
-Make sure to inizialize or assig this variable before it's been used
