# Find min and max value of vector without using built-in function

11 views (last 30 days)
Dan Kristen on 19 Sep 2022
Commented: Dan Kristen on 19 Sep 2022
Hello, I know that this question has been already asked many times, however, I kind of struggle to execute it. Max shows correct result, but the not the minimum value. What could be the solution?
A = [9 6 8 3 6 8 2 1 3 9 1 0 2]
maxval = A(1);
minval = 1;
for i = 1:length(A)
if A(i) > maxval
maxval = A(i);
else A(i) < minval
minval = A(i)
end
end

dpb on 19 Sep 2022
Edited: dpb on 19 Sep 2022
...
minval=maxval;
...
if ...
...
elseif A(i) < minval %%% HERE'S YOUR PROBLEM...SEE IT???
...
You missed the "if" part on the "else" clause -- so every thing that wasn't greater than went there and the {A(i) < minval) clause did nothing except display the result of the test to the command line; had no bearing on the logic.
Dan Kristen on 19 Sep 2022
Thank you so much!

Matt J on 19 Sep 2022
%maxval = A(1);
%minval = 1;
maxval = -inf;
minval = +inf;

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