Execution of persistent variables, MATLAB in Statistics

Execution of persistent variables:

The functions can also be called from the script or from the Command Window, as shown here. For illustration, the functions are called first from the script. With the persistent variable, value of count is incremented. Then, the func1 is called from Command Window, & func2 is also called from Command Window. As the value of the persistent variable had the value 2, at this time it is incremented to 3.

 

>> persistex

This is what occurs with a normal variable:

The value of count is 1

The value of count is 1

This is what occurs with a persistent variable:

The value of count is 1

The value of count is 2

>> func1

The value of count is 1

>> func2

The value of count is 3

 

As it can be seen here, that each and every time the function func1 is called, whether from the persistex or from Command Window, the value of 1 is printed. Though, with func2 the variable count is incremented each and every time it is called. It is first called in this illustration from persistex twice; therefore the count is 1 and then 2. Then, whenever called from the Command Window, it is incremented to 3. Obviously, the numbering of the error messages will carry on if the function is executed again.

 

Posted Date: 10/20/2012 4:16:42 AM | Location : United States







Related Discussions:- Execution of persistent variables, Assignment Help, Ask Question on Execution of persistent variables, Get Answer, Expert's Help, Execution of persistent variables Discussions

Write discussion on Execution of persistent variables
Your posts are moderated
Related Questions
Sequential Search: A sequential search is completed by looping through the vector element-by-element starting from the beginning, looking for the key. Usually the index of the

Types of errors: There are some various kinds of errors which can occur in a program, that fall into the categories of run-time errors, syntax errors, and logical errors. T

Help function: Function is computing the two values, there are two output arguments in the function header (i.e., area & circum), that are placed in the square brackets [ ]. A

Polynomials: Simple curves are polynomials of various degrees, or orders. The degree is the integer of the highest exponent in the expression. The illustrations are as follows

Functions which return Values versus printing: Also, the function which computes and returns values (throughout the output arguments) does not generally print them; that is le

function sortrows - sorting strings: The function sortrows sorts each and every row as a block, or group, and it also will work on numbers. Here in this illustration the rows

Need of a nested loop: How would we sum each individual column, rather than getting an overall sum? Answer: The programming technique would need a nested loop in whi

Function polyval - interpolation: The function polyval can then be used to compute the polynomial at particular values. For illustration, we could compute at every value in th

Editor/Debugger: The MATLAB has numerous useful functions for debugging, and debugging can also be completed through its editor, which is known as the Editor/Debugger. Typi

Steps for input output functions - Lower level file: The steps involved are as shown below:  Open the file.  Read the file, write to the file, or append to the file.