display Empty matrix: 1-by-0

 here is the question :
function can return a vector as a result. Write a function vecout that will receive 
 one integer argument and will return a vector that increments from the value of 
 the input argument to its value plus 5, using the colon operator.

I got : function vector= vecout(integer)

start= integer;

end= integer + 5;

vector= start:end;

end

The answer display Empty matrix: 1-by-0 What should I fix this porblem

Answer 1

[Mohammad Abouali]

This is very tricky

You can not use end as a variable name. That is a reserved word.

SO pretty much your definition of the function:

function vector= vecout(integer)

start= integer;

end = integer + 5;

vector= start:end;

end

becomes:

function vector= vecout(integer)

start= integer;

end

everything after the first "end" is ignored so vector is never assigned anything; thus returning as an empty array.

Correct it this way

function vector=vecout(n)
 vector=n:n+5;
end

[david Chan]

i can do this with + but cannot do this in - like function vector=vecout(n) vector=n:n-5; end

it still said Empty matrix: 1-by-0

[Mohammad Abouali]

n:n-5 returns a null vector.

Because n-5 is definitely smaller than n so that generates nothing. If you want it to generate something it should be n:-1:n-5. Then it starts going down (-1 step) to reach n-5. With plus n:+1:n+5 but since +1 is the default step you can omit it and just type n:n+5. That's why one works and the other doesn't.

[david Chan]

I get it thank you for your answer

[Mohammad Abouali]

You are welcome