Question

Write a MATLAB function named average_of_scores_with_drops The function will have two inputs and two return values. The first input will be a list of scores. The second input will be a postive integer representing the number of scores to drop. It will not be larger than the length of the list. Your function should determine the average of the scores after dropping the specified number of lowest scores. The first return value must be a real number equal to the average score. The second return value must be the number of items that were averaged. Notes: Example Test Case: SCORES

Answer 1

Answer:

-%Define the function.

function [avg, ele_left] = average_of_scores_with_drops(input_list, drop_element)

%Sort the list.

input_list = sort(input_list);

%Compute the length of the list.

len_list = length(input_list);

%Declare and initialize the variable.

sum = 0;

%Increase the element to be drop by 1.

i = drop_element + 1;

%begin the for loop.

for k = i : length(input_list)

%Add the elements.

sum = sum + input_list(k);

%End of the for loop.  

end

%Compute the elements left after dropping the dropped element.

ele_left = length(input_list) - drop_element;

%Compute the average of the elements left.

avg = sum/ele_left;

%End of the function defined.

end

%Run the following code in the command prompt.

%Call the function and return the average

%score and the number of elements

%whose average is computed.

[average_score , number_of_items] = average_of_scores_with_drops([8 6 1 2 3 5 10], 2)

SAMPLE OF OUTPUT

average_score = 6.40000000000000

number_of_items = 5