MATLAB Answers

Just a question that has been bothering me

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Comfort
Comfort on 11 Jun 2020
Commented: Rik on 14 Jun 2020
This question was flagged by Walter Roberson
What's the difference between Octave and Matlab?

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Rik
Rik on 11 Jun 2020
This time I edited your post for you. Next time, please use the tools explained on this page to make your question more readable.
Where did the second input to your function go? And why is your end statement missing?
As a side-note: it may be very difficult to complete assignments like this on a mobile device.
Rik
Rik on 14 Jun 2020
(original question and comments by Comfort Chauke (the name of OP before it was changed to Wilson) recovered from Google cache)
Comfort Chauke on 11 Jun 2020 at 9:39:
How can i solve this exam practise question
Comfort Chauke on 11 Jun 2020 at 10:33:
function [minsum, maxsum]=MyFunction(L)
sum=0;
for i=1:length (L)
sum=sum+L(i);
end
min=L(1);
max=L(1);
for i=1:length (L)
if L(i)<min
min=L(i);
end
if L(i)>max
max=L(i);
end
end
minsum=sum-max
maxsum=sum-min
Comfort Chauke on 11 Jun 2020 at 12:03:
That's my problem i don't know how make calculate the minimum and maximum values that can be obtained from adding K elements

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Accepted Answer

Rik
Rik on 11 Jun 2020
Since you aren't allowed to use efficient tools (e.g. sort), you are forced to write slow code. I would not try to use eval to cheat here, although I doubt the grader will detect that, especially if you encapsulate it in str2func.
BUT: you are in luck. You were given the task to get the numbers without repitition. The unique function will automatically sort the output for you.

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Rik
Rik on 12 Jun 2020
Use semicolons inside your code to suppress all outputs. The printing should be done in the calling function. So then you can use [minsum, maxsum]=MyFunction([1,2,3,4,5],3) and it will print those results.
Rik
Rik on 12 Jun 2020
You're welcome. If you feel I have solved your question, please consider marking my answer as accepted answer. If not, feel free to comment with your remaining issues.

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More Answers (1)

madhan ravi
madhan ravi on 11 Jun 2020
Edited: madhan ravi on 11 Jun 2020
doc mink
doc maxk
doc sum

  2 Comments

Rik
Rik on 11 Jun 2020
Since this question is supposed to be run in Octave, the students are forced to use other functions, since mink and maxk were introduced in R2017b, but aren't implemented in Octave.
madhan ravi
madhan ravi on 11 Jun 2020
Aha thanks Rik , didn't know that.

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