how to write a function to find max & min value in array
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ahmed ali
el 10 de Jul. de 2011
Comentada: DGM
el 27 de Feb. de 2023
hi every one I really need your help in this question write a function m.file to find the maximum and minimum number in array *do not use the built in functions in matlab* ? i know how to find it but i don't know how to make a function ?? could anyone help me ?
2 comentarios
Steven Lord
el 18 de Ag. de 2022
Since this is likely a homework assignment, show us the code you've written to try to solve the problem and ask a specific question about where you're having difficulty and we may be able to provide some guidance.
If you aren't sure where to start because you're not familiar with how to write MATLAB code, I suggest you start with the free MATLAB Onramp tutorial to quickly learn the essentials of MATLAB.
If you aren't sure where to start because you're not familiar with the mathematics you'll need to solve the problem, I recommend asking your professor and/or teaching assistant for help.
If you're asking for a "proper answer" to the question as originally asked, that question is impossible since the relational operators like > and <= are built-in functions in MATLAB.
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Andrei Bobrov
el 10 de Jul. de 2011
try it
function [ma mi] = alifun(A)
aw = A(:);
ma = aw(1);
mi = aw(1);
for i1 = 2:numel(aw)
if ma < aw(i1), ma = aw(i1);
elseif mi > aw(i1), mi = aw(i1);
end
end
end
1 comentario
Más respuestas (3)
Paulo Silva
el 10 de Jul. de 2011
After you watch those nice video tutorials about functions and read the documentation try to do your function and if you have any specific question please ask and we will be here to help you.
5 comentarios
Image Analyst
el 10 de Jul. de 2011
Movida: DGM
el 27 de Feb. de 2023
Also note that you used the wrong index, "a" instead of i. It should be
if Array(i)>Maximum
Maximum=Array(i);
end
or better yet, don't use i and j as indexes at all since they are the imaginary constants.
Dave Correa
el 10 de Jul. de 2011
Hello;
You can to use the following code;:
example:
>> array=magic(8)
>> [maximum,minimun]=find_maxmin(array)
maximun =
64
minimun =
1
Regards,
Dave Correa
function [maximum,minimun]=find_maxmin(array)
maximun=max(max(array))
minimun=min(min(array))
2 comentarios
Dave Correa
el 10 de Jul. de 2011
I think that this would be the simplest way to define a search function for maximum and minimum of a data matrix.
regards
Dave
Image Analyst
el 10 de Jul. de 2011
Yes, except this was a homework problem where his instructor said not to use built in functions like max and min.
Mohammed Raihan
el 7 de Mzo. de 2021
Editada: DGM
el 27 de Feb. de 2023
function[Max, Min]=minimax(M)
Max=max(M')-min(M');
maxa=max(M');
maxa2=max(maxa);
mini=min(M');
mini2=min(mini);
Min=maxa2-mini2;
end
1 comentario
DGM
el 27 de Feb. de 2023
This does not meet the requirements of the original question. The original question requires that min() and max() aren't used.
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