MATLAB: Properties and Objects

Name: MATLAB: Properties and Objects
Author: Gabriel Popoola

Learn to handle your data your way

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Course: On-Demand

Welcome to the lesson on objects as it pertains to object oriented programming in MATLAB. As you already know, with object oriented design your data is represented using objects and these objects not only contain the structure of your data, but they also contain functions that will allow you to perform operations on your data. One of the more dynamic features of MATLAB is that it allows you to use objects whether you're using object oriented design, or not. Meaning that you can create objects for your data and use them with ordinary functions. Another thing to note here is that with MATLAB the MATLAB array is the sole type of object. However, the functionality of this object varies depending on the class. And so what I mean by that is with each object, you have a data class. Now it can be a custom class, or it can be a built in class or one of the fundamental classes in MATLAB. Now, of course, with your data the type of object will match. And so if you have a a structure that contains solely strings or characters, then the data type for that object will be a char or a string. And the same goes if you're working with unsigned integers or signed integers and if you're working with floating point numbers with either single or double precision. And so for an example I'm just going to create a few different types of MATLAB arrays and I'm going to highlight how they differ. So the first thing I'm gonna do here is create a couple of variables and set them equal to different things. So the first I'll just do A equals eight. For the next one I'll do B is equal to text. For C, I'll do C is equal to letters. And if you notice here, text is using double quotes and letters is using single quotes. So the first one is a string and then the next one is a char array. And once again, all of these are MATLAB objects or object arrays. And so they are all MATLAB objects or rather MATLAB arrays but they have different classes. And so I'm just going to show the class for each one. A is a double, B is a string, C is a char or character. So if you recall, from earlier in this lesson, I said, even though all objects in MATLAB are technically MATLAB arrays their behavior will vary based on the class or the type of MATLAB array they are. And so to demonstrate this I'm just going to show you a few examples of how something as simple as the plus operator will result in different outcomes based on the data type. And so first I'm simply going to do a plus B and what you get here is a string that is a text. And so any operation involving a string and the plus operator will result in a conation of the number or the text into a single string. And so to demonstrate that again, I'm going to do B plus C and now you get text letters. And once again, it is double quotes because it's a string. However, if I were to do A plus A gives me 16, because eight plus a is 16. And so the behavior or the functionality of the operator is dependent on the class of the MATLAB array or the object that you're working with. And another thing to keep in mind is that when you do something such as a plus C what you end up getting is a series of numbers, and these numbers actually represent the decimal representation of the ASCII value of these letters in the variable C. So for lowercase L, the ASCII value is 108. And so when you add eight to 108 you get 116 and then so on and so forth. So to ask you value for a lowercase, E is 101. And when you add eight to that, you get 109. And so that's what these numbers represent. And so once again, if you notice, when you add a character to a numeric value, it uses the ask you representation. Whereas when you try to add a string to a numerical value it converts the numerical value to a string and then it combines that character with the rest of the characters in your string. And then if you're working with strictly numerics it performs a simple math operation of addition. So this concludes this lesson. Thank you.

Intermediate Provider : Gabriel Popoola 3 Lessons · 23m in Arabic, German, English, Spanish, French, Portuguese, Chinese

Course Description

Objects are at the core of object-oriented programming. Variables are represented as objects, and because of this it is vital that you understand the various properties of objects, as well as the relationship between objects and classes.

A class is a way of summarizing or grouping objects with common characteristics, while objects can be defined as specific instances of a given class. If you are going to be developing any type of code in MATLAB, it is essential that you know how to create objects from the appropriate classes and be able to access and understand their properties.

Learn to handle your data your way with this MATLAB module, in which you will learn about objects as they pertain to object-oriented programming, as well as how to create objects from custom classes, and the benefits of doing so. You will also learn about the relationship between properties, objects, and classes.

What You'll Learn

Distinguish different types of properties in MATLAB
Differentiate between a class and an object in MATLAB
Create objects from custom classes in MATLAB
Explain the relationship between properties, objects, and classes
Access and understand the properties of objects

Key Takeaways

Objects are at the core of object-oriented programming, and variables in MATLAB are represented as objects.
A class groups objects with common characteristics, while an object is a specific instance of a given class.
Creating objects from the appropriate classes is essential for accessing and understanding their properties when developing code in MATLAB.
The module covers objects, creating objects from custom classes, and the benefits of doing so.

Frequently Asked Questions

Who is this course for?

It is for anyone who is going to be developing any type of code in MATLAB and needs to know how to create objects from the appropriate classes and access their properties.

What does this MATLAB module cover?

It covers objects as they pertain to object-oriented programming, how to create objects from custom classes and the benefits of doing so, and the relationship between properties, objects, and classes.

What is the difference between a class and an object in MATLAB?

A class is a way of summarizing or grouping objects with common characteristics, while an object is a specific instance of a given class.

What lessons are included?

The course includes three lessons: Objects; Creating Objects from Classes; and Properties of Classes and Objects.

What skills will I gain from this course?

Skills covered include MATLAB, Object-Oriented Programming Language, Object-Oriented Design, Object Modeling Language, Custom Object, and Object Code.