error checking in matlab

I have a code segment where I am error checking input arguments and I am having issues making it work... the structure for the code for the two error checks are the following:

error code should be m>n or n<1 and xi=xj for i!=j

if (m>n)||(n<1)
    error('myApp:argChk', 'check for correctness of input')
end

for i = 1:n
   for j = i+1:m
       if x(i,1)=x(j,1)
           error('myApp:argChk', 'check for correctness of input')
       end
   end
end

Answer 1

[Matt Fig]

When asking a question, you need to explain what you post. What is m and n? Are they supposed to be the size of x, like:

[m,n] = size(x)

or what? Are they passed in or calculated in your function?

There is an error on this line:

if x(i,1)=x(j,1)

it should read:

if x(i,1)==x(j,1)

Please be more specific about what you want to do. This statement:

x(ii) must be equal to x(jj) for ii~=jj

doesn't make much sense. Do you mean:

x(ii,jj) must be equal to x(jj,ii) for ii~=jj

What about non-square matrices?