MATLAB which is short for Matrix Laboratory is a programming language with a number of functions and tools which are specifically built for mathematical computations and mathematical modeling of systems. It is also used in a number of fields or domains for manipulation, extrapolation as well as visualization of data.
Matlab is distributed by Mathworks and a number of versions for the product including free trials and subsidized rates for the students are available. Apart from the core programming features of MATLAB, Mathworks also provides a number of powerful packages with the tool such as Simulink which is a graphical modeling tool of MATLAB and works closely with it.
To begin with, Mathworks Matlab is pretty similar to some other programming languages like Python, Perl and Haskell and has a completely functional interactive mode where codes can be entered and executed one line at a time. The other way to go about it would be to create a script file having a number of code lines to be executed as a set of instructions in one go. These script files in MATLAB have the .m extension.
Note: To create a new script file, simply press the ‘New Script’ button on the file menu in the Home tab. You can also type the command “Edit *file name*” in the command window of MATLAB and it will ask you to create a new file in of the given file name in the directory you are working in. In this introductory article we will try and cover some very basic elements of MATLAB and its features.
MATLAB has a workspace in which all the details of the variables are present. Any variable initialized or updated will be reflected in the workspace at all the times along with the values stored in those variables.
MATLAB Arrays and matrices are the crux of MATLAB and provides a laundry list of functions and input for matrices. The arrays and matrices can be declared within square brackets. Row elements or columns are separated by commas or white spaces and the rows are separated by semi colons.
Example: j=[1 2 3; 4 5 6; 7 8 9] is a 3X3 matrix having elements 1 2 and 3 in the first row, elements 4 5 and 6 in the second row and elements 7 8 and 9 in the last row.
Matlab comes with the common methods and elements of control flow including, if-else constructs, while and for loops and break and continue statements. They are used in the same way as they are used in any other programming language with some slight modifications in the syntax. The fundamental concepts of conditional statements, however, remain the same here too.
If you are familiar with the concept of dictionary in Python, MATLAB provides the same feature under the concept of structs. Sets of data can be grouped together to form a relational model. In case of more complexity, entire classes can be created too.
Example: school.classes=12; School.students=12891; School.teachers=121; Display(school) Classes:12 Students:12891 Teachers:121
With MATLAB classes, better functionalities and encapsulations are provided than structs. However, creation of a class is only possible in the script file and not in the command window/interactive mode. The syntax for creating a class is:
Classdef “name of class” Lines of code End
MATLAB also provides the option of creating user defined functions with or without reference values which can be called and executed when in need. Creating a function in MATLAB is extremely and is similar to declaring a variable. The type of variable in this case will then by analogous with function.
Example: Function answer= multiplyTwo(input) Answer=input*2 End multiplyTwo(4) ans=8
These were the most common and most used properties of MATLAB, apart from these; MATLAB also provides the options of other programming features such as inheritance, handle, etc. MATLAB also provides a number of plotting and mapping features which can be used to plot and map mathematical functions and results. The packages of MATLAB such as Simulink package, fuzzy logic package, robotics vision and toolbox package also contain highly interactive graphical interfaces and result modules which can be used closely with their mathematical modeling counterparts.
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