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 which the outer loop is over the columns. For illustration, we will modify the earlier function to sum each column and return a row vector containing the results.

Note: The output argument will be a row vector containing similar number of columns as the input argument matrix

Also, as the function is computing a sum for each column the runsum variable should be initialized to 0 for every column. Therefore it is initialized inside of the outer loop.

 

>> mat = [3:5; 2 5 7]

mat =

    3   4   5

    2   5   7

 

>> matcolsum(mat)

ans =

    5   9   12

Obviously, the built-in sum function in a MATLAB would accomplish similar thing.

Posted Date: 10/19/2012 3:49:36 AM | Location : United States

Ask an Expert

Related Discussions:- Need of a nested loop, Assignment Help, Ask Question on Need of a nested loop, Get Answer, Expert's Help, Need of a nested loop Discussions

Write discussion on Need of a nested loop
Your posts are moderated

Write your message here..

Related Questions

While loops, WHILE Loops: The while statement is used as a conditional... WHILE Loops: The while statement is used as a conditional loop in MATLAB; it is used to repeat an action whenever ahead of the time it is not known how many times the action w

Editor and debugger, Editor/Debugger: The MATLAB has numerous useful f... 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

Data structure layers, Data structure layers: There are many layers in... Data structure layers: There are many layers in this variable. For illustration,  cyls is the whole data structure, that is a vector of structs  cyls(1) is a separate

Example of core objects, Example of Core objects: The one core graphic... Example of Core objects: The one core graphics object is a line that is also what the plot function produces. Here is an illustration of generating a line object, altering som

Nested structures, Nested Structures: The nested structure is a struct... Nested Structures: The nested structure is a structure in which at least one of the members is itself a structure. For illustration, a structure for the line segment may co

Function sortrows - sorting strings, function sortrows - sorting strings: ... 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

Graphics objects, Graphics objects: The objects involve graphics primit... Graphics objects: The objects involve graphics primitives like lines and text, and also the axes used to orient the objects. These objects are organized hierarchically, and the

Representing logical true and false, Representing Logical true and False: ... Representing Logical true and False: It has been stated that expressions which are theoretically true really have the integer value of 1, and expressions which are theoretical

Opening and closing a file, Opening and Closing a File: The Files are ... Opening and Closing a File: The Files are opened with the fopen function. By the default, fopen function opens a file for reading. If the other mode is preferred, a permission

Example of sorting strings, Example of sorting strings: To sort a cell... Example of sorting strings: To sort a cell array of strings, also the sort function is used. The illustration is as follows, >> engcellnames = {'Chemical','Mechanical',.