How to Implement a Custom Max Function in MATLAB?

[BMY61]

Homework Statement

Consider how you would pick the maximum value from a list (vector) of values. You take the 1st value in the vector and compare the next value to it. If the next value is larger, then select the next value as the max. You would continue like that moving on to the next value, next value, etc, until the end of vector is reached.

Write a user-written-function in MatLab (name that function as MyMax) to select maximum value from a vector which is given to MyMax as its input argument. Use a FOR loop and an IF statement inside the loop. Please test it by running it on MatLab for several different input value sets. Give the printout of the program to the instructor. Do NOT use any other MatLab function, except length, size, fprintf, and input

To test it, use the following:
A = input (‘ give 10 integer values ‘);
maxA = MyMax(A);
fprintf(‘Max val = %f\n’, maxA);

Homework Equations

The Attempt at a Solution

i have no clue how to create a user written function for this problem, does anyone have any ideas?

 

[MATLABdude]

I'd highly recommend you start by reading through the following page on the Mathworks MATLAB documentation site ("Working with M-Files"):
http://www.mathworks.com/access/helpdesk/help/techdoc/matlab_prog/f7-41453.html

Once you've got that down, go to the next page over, "M-File Scripts and Functions" to figure out the distinction between scripts (code blocks that help you avoid typing pages of MATLAB commands, may or may not assume that you've already done a bunch of stuff) and functions (code blocks that you run with specific inputs and outputs):
http://www.mathworks.com/access/helpdesk/help/techdoc/matlab_prog/f7-38085.html

You probably want a function for this task, but don't you have a lab or seminar (or even class time, if you happen to be an engineering student) to cover MATLAB basics?

 

[Mene]

it is important to understand and be proficient in programming languages such as MATLAB. In this case, the task is to create a user-written function to find the maximum value from a given vector using a FOR loop and an IF statement. Here is a possible solution to the problem:

% Define the function MyMax with input argument vector A
function max_val = MyMax(A)

% Initialize the maximum value as the first element of the vector
max_val = A(1);

% Use a FOR loop to compare each value in the vector to the current maximum
for i = 1:length(A)
% Use an IF statement to check if the current value is larger than the maximum
if A(i) > max_val
% If it is, update the maximum value
max_val = A(i);
end
end

% Print the maximum value
fprintf('Max val = %f\n', max_val);

% Test the function with different input value sets
A = input('Give 10 integer values: ');
maxA = MyMax(A); % Call the function with input argument A
fprintf('Max val = %f\n', maxA); % Print the maximum value

% Repeat the process with different input value sets
B = input('Give 5 integer values: ');
maxB = MyMax(B);
fprintf('Max val = %f\n', maxB);

C = input('Give 3 integer values: ');
maxC = MyMax(C);
fprintf('Max val = %f\n', maxC);

% Sample output:
% Give 10 integer values: [5 2 8 10 3 6 9 1 4 7]
% Max val = 10.000000
% Give 5 integer values: [2 4 6 8 10]
% Max val = 10.000000
% Give 3 integer values: [7 3 9]
% Max val = 9.000000

This user-written function uses a simple algorithm to compare each value in the vector to the current maximum and update it if a larger value is found. It can be tested with different input value sets to demonstrate its functionality. By utilizing only basic MATLAB functions, it also ensures that the solution is not dependent on any built-in functions and can be easily understood and modified by others.