Regarding a function saddle

hello,

can anyone please tell me how are these two codes different.

This code which I took from other discussion, is giving me correct answer.

function in=saddle(M)
[a,b]=size(M);    %%SIZE CALCULATED
in=[];            %%'in' IS INITIALIZED AS AN EMPTY MATRIX
for i=1:a
    for j=1:b
        if (M(i,j)==max(M(i,:))&& M(i,j)==min(M(:,j)))
            in=[in; i,j];     %%INDICES CALCULATION AND STORING TO 'in'
        end
    end
end
            
indices=in;       %%FINAL INDICES AS OUTPUT ARGUMENT
end

But the below one is giving incorrect answer.

function out = saddle(m)
[a,b] = size(m);
out = []; 
for i = 1:a
    for j = i:b
        if (m(i,j)==max(m(i,:))) && (m(i,j)==min(m(:,j)))
            out = [out; i,j;];
        end
    end
end

end

[Vishal]

what will be the execution code.

Answer 1

[Ameer Hamza]

In first code, 'j' varies from 1 to b

for j=1:b

In second code, 'j' varies from i to b

for j = i:b

Answer 2

[Nilesh Khodiar]

function s = saddle(M)
[r, c] = size(M);
s = [];
if r > 1
    cols = min(M);          
else
    cols = M;              
end
if c > 1
    rows = max(M');         
else
    rows = M;               
end
for ii = 1:c                
    for jj = 1:r            
        if M(jj,ii) == cols(ii) && M(jj,ii) == rows(jj) 
            s = [s; jj ii];                             
        end
    end
end