Extract one element from row vectors?

I have row vectors how can I extract one element from this vector;

A=[1 2 3 4 5]; how extract max value (5)from A MATRIX

to be A=[1 2 3 4]; only

Answer 1

[Azzi Abdelmalek]

A(A==max(A))=[]

[Mary Jon]

thank you Abdelmalek .

[Mary Jon]

how can sum the square of the remaining elements of A

[Azzi Abdelmalek]

sum(A.^2)

[Mary Jon]

if I have complex number how can finding its magnitude

[Azzi Abdelmalek]

abs(a)

see also

angle(a)
imag(a)
real(a)

Answer 2

[Wayne King]

In addition to Azzi's suggestion you can use

 A(A~=max(A))

but keep in mind that both will remove multiple values if the max() occurs more than once.

For example:

 A = [1 2 3 4 5 5];

If the max occurs more than once, you have to use a different technique to remove which entry you want. For example, say you want to just remove the first time the max occurs

 maxval = max(A);
 A(find(A==max(A),1,'first'))= [];

[Mary Jon]

Thank you King,