You just need to learn the following functions:
1, matrix representation and operation (+-*/inversion, etc. )
2. Drawing command: such as plot
3, using M file programming (as long as you master the difference between matlab language and C language, you are half successful)
4. Know how to call some common functions: for example, var() sqrt ().
Suggestion: check some of the above information online or borrow a matlab book (the thinner the better! )