how to match different values of a matrix

i have a matrix like given below:

X=[1 5 3;

1 5 4;

1 5 3]

i have to compre the elements as X(1,1)=X(2,1)=X(3,1) if its same then result must be that value i.e. (X1=1,X2=5) but if not same then the value must be what is the majority otherwise display erroe

for ex: X(1,3)~=X(2,3)=X(3,3)then X3=3

[Rik]

What have you tried so far?

[PRAVEEN GUPTA]

i am not getting only for "ex: X(1,3)~=X(2,3)=X(3,3)then X3=3"

first case i have done using if loop

Answer 1

[Guillaume]

So basically, you want

mode(X, 1)

[PRAVEEN GUPTA]

no

[Rik]

Can you explain why not?

[Guillaume]

must be what is the majority

This is the exact definition of mode. Of course, if the values are all the same, that single value is also the mode.

So, indeed as Rik says, explain why not?