Calculating dot product of 2 3 dimensional row vectors

x=input('Enter the 1st pair of 3 vector elements in [square brackets]: ');
if (x~=3); 
    disp('The vectors elements cannot contain < or > 3 elements.');
else 
    y=input('Enter the 2nd pair of 3 vector elements in [square brackets]: ');
if  (y~=3);
   disp('The vectors cannot contain < or > 3 elements.');
else 
   z=dot(x,y);
   disp('The dot product of the entered vectors is: ');
   disp(z)
end

Hi,

I am a new user on MATLAB and trying to figure out what is wrong with the code. After the first line, the code does not respond. Any suggestions would be welcome.

Thank you.

[Matt J]

What values did you enter at the prompt?

[Mughees Asif]

I inputted x = [1 2] , that should give an error as my 'if statement' states x has to be equal to 3. I am trying to ensure the inputs are always equal to 3 elements.

[Rik]

You are not returning an error, and the code you showed is missing an end.

Answer 1

[Matt J]

I think this is what you want:

x=input('Enter the 1st pair of 3 vector elements in [square brackets]: ');

if (numel(x)~=3); 
    disp('The vectors elements cannot contain < or > 3 elements.');
else
    
    y=input('Enter the 2nd pair of 3 vector elements in [square brackets]: ');
    
    if  (numel(y)~=3);
       disp('The vectors cannot contain < or > 3 elements.');
    else 
       z=dot(x,y);
       disp('The dot product of the entered vectors is: ');
       disp(z)
    end

end

[Mughees Asif]

Thank you.