Ex: Try creating structure and cell type data container in octave and observe their properties in Workspace Window. It can appear on both the right and left-hand side of an assignment. Comma-separated lists are the basic argument type to all Octave functions – both for input and return arguments. Multiple input arguments and return values of functions are organized as another data container, the comma-separated list. Cell arrays work just like N-dimensional arrays with the exception of the use of ‘’ as allocation and indexing operators.
“ uint32” : unsigned integer 32 bit (4 bytes), range.“ uint16” : unsigned integer 16 bit (2 bytes), range.“ uint8” : unsigned integer 8 bit (1 byte), range.“ int64“: signed integer 64 bit (8 bytes), range.“ int32” : signed integer 32 bit (4 bytes), range.“ int16” : signed integer 16 bit (2 bytes), range.“ int8“: signed integer 8 bit (1 byte), range.
So the rules of naming an identifier apply to a variable name. Variable names are examples of identifier names. Now try "mynum = 'c'" and see the outcome of workspace window. Ex: Try typing "mynum = 6" and observe workspace window. To change a variable, another assignment statement can be used, which assigns the value of a different expression to it. If no variable is assigned in left a generic variable “ ans” is used to store the result. Also try to understand the error displayed in last case. Ex: Try typing "mynum = 6", "mynum = 6 " and "6 = mynum" in command window. This will save the variable value in memory but doesn’t display it immediately. To suppress this result output a semicolon can be used. after the assignment, the command window immediately shows the result.
The variable is always on the left, followed by the “=” symbol, which is the assignment operator. One easy way to create a variable is to use an assignment statement.
Once the variable is created, Workspace Window shows variables along with their values, type and size of the container. Octave can itself set a type based on assignment expression. Although it is not necessary to define the type of variable. To store a value in an Octave session, or in a program, a variable is used like any other programming language. Like the earlier article, we encourage readers planning to learn octave/Matlab to try the exercises marked as “ Ex“.
This article is a continuation of the series dealing with variables and constants in Octave. The article titled “Octave:1> Getting Started” discusses the desktop environment and develops some familiarities with GNU Octave. Learning one paves the way to learn another without any additional effort. Octave showing the perfect compatibility with MATLAB keeps its tag of being called open source clone of MATLAB. This entry is part 3 of 11 in the series GNU Octave