Add SINGLE element to array or vector
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Pedro GUillem
on 12 May 2016
Commented: Image Analyst
on 27 May 2022
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?
1 Comment
Image Analyst
on 27 May 2022
@Anushalini Thiyagarajan I have no idea what you mean. Please ask your question in a new question (not here) after you read this:
In the meantime, look at input functions such as readmatrix, importdata, dlmread, xlsread, fgetl, etc.
Accepted Answer
Image Analyst
on 12 May 2016
Edited: Image Analyst
on 18 Oct 2020
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]
6 Comments
Stefano Cardarelli
on 26 Mar 2020
Edited: Stefano Cardarelli
on 26 Mar 2020
also this works for me, is basically direct indexing:
x(end+1) = newval
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