Question

For this question you need to create a function in Octave called MyFunction that accepts two inputs, a list L and an integer K, and returns two values minsum and maxsum. A template function including the function prototype (first line) has already been created for you to use (do not change this). I will only mark the contents of the MyFunction.m file. Any code added to the main.m file is for your testing only and will not be marked.

Your function needs to calculate the minimum and maximum values that can be obtained from adding any K values in the list of numbers (without repetition) and return these in minsum and maxsum respectively.

You may not use the built-in sort function and the word "sort" may not appear anywhere in your function (including comments). If the marking script finds the word sort anywhere in your code, you will get 0 for this question.

Example input:

L = [1, 2, 3, 4, 5]

K = 3

Example output:

minsum = 6

maxsum = 12

In the above example, minsum = 6 as the result of adding the three numbers 1, 2 and 3, maxsum = 12 as the result of adding the three numbers 3, 4 and 5.

Requested files

main.m

    1 % DO NOT MODIFY THIS FILE
    2 % ADD ALL YOUR CODE IN THE MyFunction.m FILE
    3 
    4 [minsum, maxsum] = MyFunction([1,2,3,4,5], 3)

MyFunction.m

    1 function [minsum, maxsum] = MyFunction(L, K)
    2 
    3 
    4 end

Answer 1

MATLAB code to calculate minsum and maxsum of a list

Language : MATLAB

Code:

%MyFunction to calculate minsum and maxsum
function [minsum, maxsum] = MyFunction(L, K)
%initializing empty list
B = []
%sorting list L and adding the elements in list B
while ~isempty(L)
indmin = (L==min(L))
B = [B,L(indmin)]
L(indmin) = []
end
%initializing minsum and maxsum to 0
maxsum=0
minsum=0
%for loop to calculate minsum
for i=1:K
minsum+=B(i)
end
%for loop to calculate maxsum
for s=length(B):-1:length(B)-(K-1)
maxsum+=B(s)
end
end

Code Screenshot:

MyFunction.m RUN 4 8 9 1 %MyFunction to calculate minsum and maxsum 2 function [minsum, maxsum] = MyFunction(L, K) 3 %initializing empty list B = [] 5 %sorting List L and adding the elements in List B 6 while wisempty(L) 7 indmin = (L==min(L)) B = [B,L(indmin)] L(indmin) = [] 10 end 11 %initializing minsum and maxsum to e 12 maxsum=0 13 minsum=0 14 %for Loop to calculate minsum 15 for i=1:K 16 minsum+=B(i) 17 end 18 %for Loop to calculate maxsum 19 for s=length(B):-1: length(B)-(K-1) 20 1+=B(s) 21 end 22 maxsum+= end

Output:

octave:9> source("MyFunction.m") L = 4 2 5 3 1 = 6 minsum maxsum [2