Question

I have recently started learning MatLab, and wrote the following script today as part of my practice to see how we can generate a vector:

x = [];
n = 4;
for i = i:n
    x = [x,i^2];
end
x

When I run this script I get what I expect, namely the following vector:

x = 0 1 4 9 16

However, if I run the script a second time right afterwards I only get the following output:

x = 16

What is the reason for this? How come I only get the last vector entry as output the second time I run the script, and not the vector in its entirety? If anyone can explain this to me, I would greatly appreciate it.

Answer 1

you forget to initialize i.
after first execution i is 4 and remains 4.
then you initialize x as an empty vector but because i is 4 the loop runs only once.

clear your workspace and inspect it before and after first execution.