# Learning Matlab: 02 Introduction

2015/12/12

## MATLAB Resources for Machine Learning

At the MATLAB command line, typing help followed by a function name displays documentation for a built-in function. For example, help plot will bring up help information for plotting. Further documentation can be found at the MATLAB documentation pages.

MathWorks also has a series of videos about various MATLAB features:

### Introduction to MATLAB

Learning Module |
Learning Goals |

What is MATLAB? | Introduce MATLAB |

The MATLAB Environment | Navigate the command line, workspace, directory, and editor |

MATLAB Variables | Use the assignment operator to define scalar variables |

MATLAB as a Calculator | Perform arithmetic calculations with scalars and functions using MATLAB syntax and order of operations. |

Mathematical Functions | Use MATLAB variables for input and output to functions. Examples include: COS, SIN, EXP, and NTHROOT. |

### Vectors

Learning Module |
Learning Goals |

Creating Vectors via Concatenation | Create vectors by entering individual elements |

Accessing Elements of a Vector | Access specific elements of a vector |

Vector Arithmetic | Perform arithmetic calculations with vectors including element-wise operations |

Vector Transpose | Use the transpose operator to convert between row and column vectors |

Creating Uniformly Spaced Vectors (The Colon Operator) | Use the colon operator syntax to create vectors given the starting and ending values and the size of the interval |

Creating Uniformly Spaced Vectors (The LINSPACE Function) | Use the LINSPACE function to create a vector. |

### Visualization

Learning Module |
Learning Goals |

Line Plots | Create a line plot of a vector and customize plot markers and colors |

Annotating Graphs | Label axes, add a title, and add a legend to a plot |

### Matrices and Arrays

Learning Module |
Learning Goals |

Creating Matrices | Create matrices by directly entering scalars |

Array Creation Functions | Create larger matrices and vectors with built in MATLAB functions such as ZEROS and EYE |

Accessing Elements of and Array | Access elements of an array including entire columns or rows using row-column indexing. |

Array Size and Length | Use built-in functions to determine array dimensions |

Concatenating Arrays | Build larger arrays from smaller ones |

Matrix Multiplication | Perform matrix multiplication and interpret error messages related to incompatible dimensions. |

### Programming

Learning Module |
Learning Goals |

Using the MATLAB Editor | Write a script in the MATLAB Editor, break code into sections to execute, and find help on functions |

Logical Operators | Use relational and logical operators to create logical variables for program control |

Conditional Data Selection | Access and change elements for a vector the meet a specified criteria |

If-Else Statements | Use if-else statements to control which lines of code are evaluated |

For Loops | Repeat a sequence of commands a specified number of times |

While Loops | Repeat a sequence of commands while a specified condition is true |

Note: all the above information is duplicated from standford machine learning course on Coursera.

Related Article: Learning Matlab: 01 Introduction

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