Variable packages:

Variable packages are now the vector of structures, hence each and every element in the vector is a structure. To show one element in the vector, an index into the vector would be identified. For illustration, to refer to the second element:

>> packages(2)

ans =

item_no: 456

   c  ost: 5.9900

   price: 49.9900

   code: 'l'

 

To refer to the field, it is essential to refer to the specific structure, and then the field within it. This means that using an index into the vector to refer to the structure, and then the dot operator to refer the field. For illustration:

>> packages(1).code

ans =

g

 

Hence, there are necessarily three levels to this data structure. The variable packages are at highest level that is a vector of structures. Each of its elements is a separate structure. The fields within these individual structures are at lowest level. The loop below displays each element in the packages vector.

 

>> for i = 1:length(packages)

disp(packages(i))

end

   item_no: 123

cost: 19.9900

price: 39.9500

code: 'g'

   item_no: 456

cost: 5.9900

price: 49.9900

code: 'l'

   item_no: 587

cost: 11.1100

price: 33.3300

code: 'w'

 

To refer to a specific field for all structures, in most of the programming languages it would be essential to loop through all the elements in vector and use the dot operator to refer to the field for each element. Though, this is not the case of MATLAB.

Posted Date: 10/20/2012 6:06:17 AM | Location : United States

Ask an Expert

Related Discussions:- Variable packages, Assignment Help, Ask Question on Variable packages, Get Answer, Expert's Help, Variable packages Discussions

Write discussion on Variable packages
Your posts are moderated

Write your message here..

Related Questions

Index vector, Index vector: The index vector is then used as the indic... Index vector: The index vector is then used as the indices for original vector. To get grades vector in ascending order, the indices used would be grades (2), grades (5), and

Sequential search, Sequential Search: A sequential search is completed... 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

Illustration of binary search, Illustration of Binary search: An illus... Illustration of Binary search: An illustration to search for the key of 91 in the vector is as shown below: The table below shows what will happen in each iteration of

Example of mode, Example of Mode When no value appears more often than ... Example of Mode When no value appears more often than any other, the smallest value in the vector will be the mode of the vector. >> shortx = [2 5 1 4]; >> mode(shortx

Tracing a error, Tracing: Sometimes, when a program has loops and/or s... Tracing: Sometimes, when a program has loops and/or selection statements and is not running properly, it is helpful in the debugging process to know exactly which statements h

Example of function stubs, Example of Function stubs: The three functi... Example of Function stubs: The three functions have not so far been written, though, therefore the function stubs are put in place so that the script can be executed and teste

Nested for loops, Nested for Loops: The action of a loop can be any of... Nested for Loops: The action of a loop can be any of the valid statement(s). Whenever the action of a loop is the other loop, this is known as nested loop. As an illustrati

Lower level file i/o functions, Lower Level File I/O Functions: Whenev... Lower Level File I/O Functions: Whenever reading from data file, as long as the data in the file is "regular" the load function works-in another words, the similar type of dat

Assignment , Determine sequence weights for the sequences ACTA, ACTT, CGTT,... Determine sequence weights for the sequences ACTA, ACTT, CGTT, and AGAT in problem 1 by using Thompson, Higgins, and Gibson method a) compute pairwise distances between sequences

Logical built-in functions, Logical Built-In Functions: There are buil... Logical Built-In Functions: There are built-in functions in the MATLAB which are useful in conjunction with vectors or matrices of all logical true or false values; two of the