add elements to an existing vector

Hi,

I have a vector where I would like to add 5 NaN at the beginning. When I am doing it for one NaN, it's working fine, but not for five

This code worked fine:

lastDelta = [NaN;delta(1:end-1)];

and creates me a new vector that consists of one NaN and all the element of the existing vector delta except the last one

however, this code here is not working:

lastDelta = [NaN;NaN;NaN;NaN;NaN;delta(1:end-5)];

Has anybode an idea what I am missing?

Answer 1

[Lam]

You mean adding or replacing?

This works for me:

delta = [1;2;3]
[NaN;NaN;NaN;NaN;NaN;delta(1:end)]

[Locks]

I am looking for a way to create a new vector that contains 5 NaN and then all the elemets from vector delta, except for the last 5, due to the fact that both vectors should have the same length

Answer 2

[Youssef Khmou]

hi, try this :

 R=rand(1,10); % initial vector
 add=NaN*ones(1,5);
 New=[add R];

[Locks]

it's working now, one of the series had just not enough elements, thanks