How to assign vectors to existing vector

Hi all

I want to assign a set of vectors in place of zero to existing vectors (ventor_2). But I always want to check the the new set of vectors (newvector_2) does not have the number that exist in previous vector (vector_1)

Vector_1 = [ 1 2 3 4]

Vector_2 = [ 2 0 4 0 6 7 ] Newvector_2 = [ 2 5 4 8 6 7]

How can I do that

Thank you

[Guillaume]

Why can't you use Madhan's answer to your previous question?

Just replacing the max(a) by max(Vector1).

Do try to understand the answers you're given so that you can adjust them to your need.

[Basil C.]

"new set of vectors (newvector_2) does not have the number that exist in previous vector (vector_1)"

--> is there any order in which the non repeated numbers must occur or should it be totally random?

[karishma koshy]

Yes, it should be in the chronological order

[karishma koshy]

@Guillaume I have got a set vectors vector_1 before vector_2. So I want to confirm that newly assigned numbers to newvector_2 are not present in vector_1. I know how to check for a single number . But how can I do it for all the numbers in the vector?

Answer 1

[Samatha Aleti]

Without logically going to each element you can use functions like find(), intersect(), setxor() for vectorization in achieving what you need. Here is how you can do it:

vector_1 = [ 1 2 3 4]; 
vector_2 = [ 2 0 4 0 6 7]; 
% x is the vector whose elements are to be added to vector_2 
x = [1 2 5 8]; 
xcommon = intersect(x, vector_1); 
vector_3 = setxor(x,xcommon);  
idxZero = find(~ vector_2); 
% Truncate additional elements 
vector_3(length(idxZero)+1:length(vector_3)) = []; 
vector_2(idxZero) = vector_3; 

For detailed information on above functions, refer the following document links:

intrersect, find, setxor

[madhan ravi]

Where did x come from?

[Samatha Aleti]

I took "x" as an example here. In your case "x" is the vector set whose elements are to be added in place of zeros of vector_2.

Answer 2

[madhan ravi]

newvector_2=vector_2;
ix=nnz(~vector_2);
v12=[vector_1,nonzeros(vector_2).'];
u=unique(v12);
d=setdiff(1:max(v12),v12);
newvector_2(~vector_2)=[d,max(v12)+(1:ix-numel(d))]       

Answer 3

[Andrei Bobrov]

Let X - interval for input data in 'vector_2'

X = [0, 15];
x = setdiff(X(1):X(2),vector_1); % input data
newvector_2 = vector_2; 
lo = vector_2 == 0;
n = sum(lo);
b = repmat(x,1,ceil(n/numel(x)));
newvector_2(lo) = b(randperm(numel(b),n));