Add element to a given vector

2020 4 10
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I have a vector of the format:
x = [X1 X2 … Xn]
I want to add an element to the end, X(n+1). How do I do that?
x = [ X1 X2 .. Xn X(n+1) ]
ex: x = [ 1 4 2 8]
newX = [ 1 4 2 8 9]
A little help, please!

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per isakson
per isakson 2020-4-10
编辑：per isakson 2020-4-10

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One way
>> x = 1:6
x =
1 2 3 4 5 6
>> x(end+1)=17
x =
1 2 3 4 5 6 17
>>

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steve Brian
steve Brian 2020-4-10
I can't do with a for loop to look for the final elements, then add to the last element that n + 1?
Because, I have a vector of n elements, and I want to add them to n + 1 at the end, without specifying the element
per isakson
per isakson 2020-4-10
I'm not sure I understand. What about this
x = [ 1 4 2 8];
newX = [ x, 9 ]
newX =
1 4 2 8 9
steve Brian
steve Brian 2020-4-10
Let's say we have a matrix of MxN, I insert the elements of the matrix into a vector, then I want the last element to be n + 1
V = [ 12 21 10;
7 2 1;
8 5 21; ]
NewV = [ 12 21 10 7 2 1 8 5 21 "22"]
I have already the newV, but i want to add that n+1 element
per isakson
per isakson 2020-4-10
I'm even more confused
"I have already the newV, but i want to add that n+1 element"
Isn't that exactly what's done by
NewV(end+1) = 22;
steve Brian
steve Brian 2020-4-10
Sorry I am not precise .. I want to be an algorithm that takes each element of the vector and when it has reached the end, to add them ( without specifying it) the last element + 1
Something like:
V = [ x1 x2 x3 ...... xN]
Let's say p is the algorithm or function. P will check each element in the vector, and when it reaches its tail, the end of the vector, add +1 to the last element
new V = [ x1 x2 x3 .... xN x(N+1) ]
p = x1 (first element)
p = x1 x2 (second elem)
p = x1 x2 x3 ( third el)
p = x1 x2 x3 .. xN ( oh, the N element is the tail, i need to put the last element to this tail, N +1, to be like N N +1)
finally: new V = [ x1 x2 x3 .... xN x(N+1) ]

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