It is not possible to convert a .slx file into a .m file directly.You can only generate C, C++, or HDL / VHDL from Simulink model using Simulink Coder. However If you need to run your Simulink model in the MATLAB Script you can do so using Sim.
To visualize the execution order of blocks in Simulink model. You can go to Debug tab in Simlink and then in Information Overlays go to Execution Order. For more info see this.
To visualize the Simulation Data in Simulink Model please refer to the following link:https://www.mathworks.com/help/simulink/ug/viewing-output-trajectories.html
