Guidance for strength of materials in matlab.

[mech-eng]

Hi, all I have to do a project but I need some guidance. I have to make MATLAB draw bending
moment and shear force diagrams of a beam which have to be loaded with a distributed load,
a single force, and a single moment. First I have to make MATLAB draw a beam like in the picture.

 

[mech-eng]

I also need to understand codes in the picture. For this what topics of MATLAB should I study.