Add SINGLE element to array or vector

I have a vector of the format:

x = [xval(1) xval(2) … xval(n)]

, and I want to add an element to the end, xval(n+1). How do I do that?

Answer 1

[Image Analyst]

For an existing vector x, you can assign a new element to the end using direct indexing. For example

x = [1 2 3]
x(4) = 4

or

x(end+1) = 4;

where "end" is a special keyword in MATLAB that means the last index in the array. So in your specific case of n elements, it would automatically know that "end" is your "n".

Another way to add an element to a row vector “x” is by using concatenation:

x = [x newval]

or

x = [x, newval]

For a column vector:

x = [x; newval]

For more information, see Creating, Concatenating, and Expanding Matrices.

[Weird Rando]

Also, you need to initialise the variable x before your for loop.

x = [];

And inside the for loop you use Image Analyst code.

[Pedro GUillem]

Thank you so much!!

[Brent Vaalburg]

How would you add a delimeter to this?

[Image Analyst]

Please state exactly what you'd like as an output. It sounds like you want a string (character array).

[Mathi]

The above code is working perfectly. Thank you.

[Stefano Cardarelli]

also this works for me, is basically direct indexing:

x(end+1) = newval

Answer 2

[Dakota Jandek]

x = [1, 2, 3]

x(length(x)+1) = 4

[Adrien Bouguerra]

amazing method , really efficient thank u so much Dakota

[Image Analyst]

Or even better,

x = [1, 2, 3]
x(end+1) = 4

Answer 3

[Youssef AAKAM]

x=[]

x=[x;'ysf']