Question about variable in a vector.

a part of my program has syntax that looks like this, btw, my goal is to display an error message if i inserted a non-integer value to a vector.

for n=1:1:A1 

       if (Z(n)<3 | Z(n)>9 | Z(n)~=Z(n)) 

          disp('One or more of the element/s is/are not included.'); 

       return;

       elseif ~isnumeric(Z(n))

          disp('There is error')

       return; 

       end
end

so if i enter:

function_name ([3 4 A], [4 5 6])

matlab says: Undefined function or variable 'A'.

what should i do for it to run and just display an error message.

[Azzi Abdelmalek]

Z(n)~=Z(n) this is always false

and what is your function function_name

[Matt Fig]

Azzi:

z = nan;
z(1)~=z(1)

[Azzi Abdelmalek]

hum, good to know. Thanks Matt

[Jan]

@James Ortiz: Are you going to delete the text of the question as in your former thread Answers_ 48636? If so, I'm not going to post an answer.

[Matt Fig]

OP: a part of my program has syntax that looks like this, btw, my goal is to display an error message if i inserted a non-integer value to a vector.

for n = 1:1:A1 
     if (Z(n)<3 | Z(n)>9 | Z(n)~=Z(n)) 
        disp('One or more of the element/s is/are not included.'); 
        return;
     elseif ~isnumeric(Z(n))
        disp('There is error')
        return; 
     end
end

so if i enter:

function_name ([3 4 A], [4 5 6])

matlab says: Undefined function or variable 'A'.

what should i do for it to run and just display an error message.

[EDITED, Jan, code formatted. @James Ortiz: please use one of the many tutorials to learn how to do this by your own. Thanks!]

[Portgas Ace]

@matt, ive searched and read tutorials but still cant find a solution to my problem. what should i do. :(

Answer 1

[Matt Fig]

You cannot rely on mixing types in a regular array.

 [3 4 A]

may return an error message if A is not defined, or if A is not numeric.

A = 6;
[3 4 A]  % No error.

As Azzi points out, Z(n) is always equal to Z(n) unless Z(n) is a nan. If you want to deal with nans, use isequalwithequalnans.

Answer 2

[Portgas Ace]

@Jan Simon, sorry about that. wont do it again. :(

[Jan]

Fine, thanks. Please post comments to comments as comments and not as answer of a question.

[Portgas Ace]

sorry. im not yet used to using this page. can you help me with the code. :(