recursive function to calculate Max number.

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Urmish Haribhakti
回答： Welid Benchouche 2021-8-18
function mx=recursive_max(v)
if numel(v)==1
mx=v;
end
if numel(v)>1
mx= recursive_max(1);
end
this much i've got so far.
Please help with this code.
  1 个评论
JAYANTHI SANKARALINGAM
JAYANTHI SANKARALINGAM 2020-9-20
When we use this,it shows error as
incorrectRandom vector Variable mx has an incorrect value. Test failed using v =[ 14 92 89 27 8 ]

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采纳的回答

Stephen23
Stephen23 2020-9-10
编辑：Stephen23 2020-9-10
Urmish Haribhakti's general approach is quite good, with a few small changes it will work correctly:
function x = recmax(v)
if numel(v)<=1
x = v;
else
x = recmax(v(2:end));
if v(1)>x
x = v(1);
end
end
end
And tested:
>> recmax([28,2,6,1,999,8])
ans = 999

更多回答（5 个）

Mati Somp
Mati Somp 2020-10-9
One more
function mx = recursive_max(v)
if length(v)==1
mx=v
else
if v(1)<=v(2)
v(1)=[]
else
v(2)=[]
end
mx=recursive_max(v)
end
  1 个评论
xin yi leow
xin yi leow 2021-1-25
This works for me and is easy to understand! if v(1) < v(2), we remove the first element, and if v(2)<v(1), we remove the v(2), that way we only keep the larger of the 2 elements in the vector. The last remaining element will naturally be the largest one.

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Ameer Hamza
Ameer Hamza 2020-9-9
编辑：Ameer Hamza 2020-9-10
Something like this:
function mx = recursive_max(v)
x = zeros(1, 2);
if numel(v) > 2
a = floor(numel(v)/2);
x(1) = recursive_max(v(1:a));
x(2) = recursive_max(v(a+1:end));
elseif numel(v) == 1
x = [v -inf];
else
x = v;
end
if x(1) > x(2)
mx = x(1);
else
mx = x(2);
end
end
I am not sure if this is an optimal algorithm.
  2 个评论
Ameer Hamza
Ameer Hamza 2020-9-10
It divides the input vector into two parts recursively. When the length of the divided vector reaches two during recursion, the recursion stops, and the function returns back the largest of the two elements.

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JAYANTHI SANKARALINGAM
Write a function called recursive_max that finds the maximum element in a vector without using loop or any built in functions.the sole output argument is the maximum value in the input vector.
Himalsha Dharmapala
function output= recursive_max3(v)
if v(1,:)==0
output=v(1);
else
if v(end)>=v
output=v(end);
else
output= recursive_max3(v(1:end-1));
end
end
end
Welid Benchouche
Welid Benchouche 2021-8-18
my solution to this assignment is
function mx = my_recursive_max(v)
% base case
if length(v) == 1
mx = v;
else
% recursive case
a = v(end);
b = v(1);
if a <= b
mx = b;
mx = my_recursive_max(v(1:end-1))
else
mx = a;
mx = my_recursive_max(v(2:end))
end
end

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