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

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

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

Persistent variables, Persistent Variables: Generally, whenever a func... Persistent Variables: Generally, whenever a function stops executing, then the local variables from that function are cleared. That means that each and every time a function i

Help function, Help function: Function is computing the two values, th... 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

Example of functions which return values, Example of Functions which return... Example of Functions which return values: Calling this function prints the circumference, since there is no way to store the value, hence, it can be used in following computat

Vectorizing, Vectorizing: In most of the cases in MATLAB, loops are no... Vectorizing: In most of the cases in MATLAB, loops are not essential. As MATLAB is written specifically to work with the vectors and matrices, most operations can be completed

Illustration of reading from files, Illustration of reading from files: ... Illustration of reading from files: For illustration, suppose that there is a data file 'subjexp.dat' that has on each line a number followed by thecharacter code. The type fu

Bj, bjjh bjjh

Execution of persistent variables, Execution of persistent variables: ... 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

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