find the sum by function

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Eyad Ramadan
Eyad Ramadan on 29 Jul 2020
Commented: Johannes Hougaard on 12 Aug 2020
find the sum by function
  1 Comment
Sriram Tadavarty
Sriram Tadavarty on 29 Jul 2020
What is looked for here? Whats the output that is expected from the sample vector? Can you show the code that you tried and where you struck?

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Answers (2)

Cristian Garcia Milan
Cristian Garcia Milan on 29 Jul 2020
I think that your problem is the function definition. Actually you are using total as input and v as output and I think that your intention is the opposite. The function should be:
function [total]=grade_eyad(v)
min(v);
mean(v);
v(min(v))=mean(v);
total=sum(v)
end
When you have these code saved, you can use:
v=[12 9 6 10 13];
total=grade_eyad(v)
  1 Comment
Eyad Ramadan
Eyad Ramadan on 29 Jul 2020
how i can replace the minimum grade by the average of grades , then calculate the sum of the grades ?

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Johannes Hougaard
Johannes Hougaard on 29 Jul 2020
function total = grade_eyad(v)
[~,idx] = min(v); %finding the position of the minimum value (3 in the given example)
v(idx) = mean(v); %replacing the value (Christians code will replace the 6th element (13)
total = sum(v);
end
or you could index in another way (will be better if there are more 6'es to be replaced)
function total = grade_eyad(v)
v(v == min(v)) = mean(v); % find all instances where v equals min(v) by the == operator and replace by mean(v)
total = sum(v);
end
  2 Comments
Johannes Hougaard
Johannes Hougaard on 12 Aug 2020
save the function as grade_eyad.m
Then you'll be able to call it from your workspace with an output with any name you like and with alterations to v (or use another variable name if desired).
v = [12 9 6 10 13];
total = grade_eyad(v)
w = [12 8 5 8 8 6 8 10 13 10 11];
total_w = grade_eyad(v)

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