Calculating dot product of 2 3 dimensional row vectors

Question

Mughees Asif 2019-2-20

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446057-calculating-dot-product-of-2-3-dimensional-row-vectors

评论： Mughees Asif 2019-2-20

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.

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Mughees Asif 2019-2-20

编辑：Mughees Asif 2019-2-20

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 2019-2-20

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

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Answer 1

Matt J 2019-2-20

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/446057-calculating-dot-product-of-2-3-dimensional-row-vectors#answer_361920

编辑：Matt J 2019-2-20

在 MATLAB Online 中打开

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